Invreiella, , Suarez, 1966

Waldren, George C., Williams, Kevin A., Cambra, Roberto A. & Pitts, James P., 2020, Systematic revision of the North American velvet ant genus Invreiella Suárez (Hymenoptera: Mutillidae) with description of eleven new species, Zootaxa 4894 (2), pp. 151-205 : 159-160

Key to Invreiella females

1. Procoxa anteriorly dentate (fig. 63)....................................................................... 2

– Procoxa anteriorly edentate, merely convex............................................. most Pseudomethocini

2 (1). Genal process present and posteriorly carinate (figs 28, 29, 32–34, 51, 52, 65–78). Mesosoma widest at pronotum in dorsal view. Dorsolateral margin of mesonotum merely crenulate-carinate, sometimes with tubercle anterior to propodeal spiracle (figs 96–110).............................................................................. 3 ( Invreiella )

– Genal process absent, gena merely convex and carinate. Mesosoma widest at mesonotum in dorsal view. Dorsolateral margin of mesonotum anteriorly produced into curved process........................................ undescribed genus

3 (2). Clypeus produced into flattened plate-like structure, apical margin medially with two closely-spaced tubercles (figs 24, 25)............................................................................... 4 ( I. satrapa species-group)

– Clypeus with complete or medially interrupted transverse arcuate carina and lateral tubercle ventrad to carina (figs 26, 27).. 6

4 (3). Clypeus with apical margin medially elongate (fig. 24), tubercles triangular in dorsal view (sometimes worn down) and basally conjoined. Apical 1/4 of T2 with orange to red-brown integument with orange-red setae, apical fringe of T2 with median patch of black setae, remainder fringed with whitish setae (figs 18, 19)............................................... 5

– Clypeus with apical margin only slightly longer medially than laterally (fig. 25), apical tubercles semi-circular in dorsal view (sometimes worn down) and basally separated. Apical 1/4 of T2 with black integument covered with black setae, apical fringe of T2 with wide median band of black setae, extreme lateral margin fringed with whitish setae (fig. 17)................................................................................... I. breviclypeata Waldren , sp. nov. (p. 37)

5 (4). Genal process straight (fig. 29). Posterior declivity of pronotal carina lobate and projecting away from mesopleuron, overlapping and obscuring dorsal portion of pronotal-mesopleural suture (figs 31, 106).......... I. satrapa (Gerstaecker) (p. 41)

– Genal process curved (fig. 28). Posterior declivity of pronotal carina evenly rounded and flush with mesopleuron, dorsal portion of pronotal-mesopleural suture clearly visible (figs 30, 105)................. I. chihuahuensis Waldren , sp. nov. (p. 39)

6 (3). Clypeus with transverse arcuate carina broadly interrupted medially, area merely punctate, resulting in bilateral carinate pro- cesses each with enlarged tubercle ventrad to process (fig. 26)......................... 7 ( I. cardinalis species-group)

– Clypeus with transverse arcuate carina complete, with small lateral tubercle ventrad to carina (fig. 27)................. 9

7 (6). Genal carina posteriorly sinuate in lateral view (figs 33, 34). Dorsolateral margin of mesosoma, from pronotal carina to propodeal spiracle, sinuate and undulating in outline in dorsal view (fig. 36). Integument of dorsum of head, mesosoma, and center of T2 orange-red (figs 13, 14)........................................................................... 8

– Genal carina posteriorly convex in lateral view (fig. 32). Dorsolateral margin of mesosoma, from pronotal carina to propodeal spiracle, straight in outline in dorsal view (fig. 35). Integument of dorsum of head, mesosoma, and T2 dark brown-red (fig. 12)................................................................. I. acuminata Waldren , sp. nov. (p. 25)

8 (7). Antennal scrobe carina straight (fig. 39). Genal process spinose and curved (fig. 33), carina anterior to process distinctly crenulate-tuberculate. Mesopleuron with ventral 1/3 rugose-granulate with weak rugae and few moderate punctures (fig. 37)............................................................................. I. cardinalis (Gerstaecker) (p. 27)

– Antennal scrobe carina arcuate (fig. 40). Genal process triangular and weakly curved (fig. 34), carina anterior to process obscurely crenulate. Mesopleuron with ventral 1/3 micropunctate with interpunctal space smooth (fig. 38).................................................................................... I. cuernavaca Waldren , sp. nov. (p. 30)

9 (6). Antennal rim tuberculate (fig. 49). Pronotal carina present and glabrous, often crenulate (figs 41, 46, 53, 54). T2 with two separate or coalescing light integumental spots (figs 9–11)............................ 10 ( I. australis species-group)

– Antennal rim rounded (fig. 50). Pronotal carina absent, area merely punctate to rugose-punctate, puncture edges sometimes tuberculate, simulating obscure pronotal carina (figs 42, 43, 47, 48). T2 integument without integumental spots (figs 15, 16, 20), or with setal and integumental pattern in exaggerated “W” shape (figs 21, 22)................................ 12

10 (9). Antennal scrobe carina arcuate (fig. 45). Integument of head orange to dark brown-red, without patches of black integument (figs 10, 11, 66, 67).................................................................................. 11

– Antennal scrobe carina straight (fig. 44). Integument of head black at posterolateral corners, gena, and occiput; integument of frons and part of vertex orange (figs 9, 65).................................... I. australis Waldren , sp. nov. (p. 20)

11 (10). Genal process denticulate, inconspicuous (fig. 51). Lateral face of pronotum mostly with moderate punctures (fig. 53). T2 with two separated yellow integumental spots (fig. 10)............................ I. bimaculata Waldren , sp. nov. (p. 22)

– Genal process triangular (fig. 52). Lateral face of pronotum with few moderate punctures (fig. 54). T2 with two light orange coalescing integumental spots (fig. 11).................................. I. mesomexicana Waldren , sp. nov. (p. 23)

12 (9). Frons not transversely recessed and not concave below antennal scrobe carinae, antennal rims visible in lateral view (fig. 55). Mesopleuron and lateral face of propodeum mostly striate-rugose (fig. 61). Northwestern Mexico (Chihuahua) and southwestern USA (Arizona and New Mexico).......................................... 13 ( I. cephalargia species-group)

– Frons transversely recessed and concave below antennal scrobe carinae, antennal rims not visible in lateral view (fig. 56). Mesopleuron and lateral face of propodeum mostly weakly sculptured, with few punctate and rugose patches (fig. 62). Southern Mexico (Guerrero, Jalisco, and Morelos)........................................... 14 ( I. suarezi species-group)

13 (12). Vertex with dense golden setae (fig. 15). Dorsum of T2 with central patch, or two median patches, of golden setae (sometimes sparse or worn off) (fig. 15). Antenna, pleura, lateral face of propodeum, and legs orange (fig. 15)................................................................................................. I. cephalargia (Mickel) (p. 32)

– Vertex with orange setae and scattered black setae (fig. 16). Dorsum of T2 without central patch/patches of golden setae, with predominantly orange-red setae (fig. 16). Antenna, pleura, lateral face of propodeum, and legs dark red-brown to black (fig. 16)................................................................... I. manleyi Waldren , sp. nov. (p. 35)

14 (12). Vertex with light yellow setae (fig. 21) or coppery-orange setae (fig. 22). T2 with distinct pattern in exaggerated “W” shape (figs 21, 22)........................................................................................ 15

– Vertex with red-orange and few black setae (fig. 20). T2 concolorous orange-red, without distinct pattern (fig. 20)......................................................................... I. erythrocephala Waldren , sp. nov. (p. 44)

15 (14). Vertex with coppery-orange setae (fig. 22). T2 pattern narrow in shape (fig. 22). Mandible dilated sub-apically (fig. 59). Mesopleuron with vertical column of punctures tuberculate both anteriorly and posteriorly, forming parallel carinae bounding punctures (fig. 58)........................................................ I. tequila Waldren , sp. nov. (p. 48)

– Vertex with light yellow setae (fig. 21). T2 pattern broad in shape (fig. 21). Mandible acuminate (fig. 60). Mesopleuron with vertical column of punctures only tuberculate posteriorly, forming a single carina adjacent to punctures (fig. 57)................................................................................. I. suarezi Waldren , sp. nov. (p. 46)