Hemutilla cheni Tu et Lelej

Tu, Bin-Bin, Lelej, Arkady S. & Chen, Xue-Xin, 2014, Review of the genus Cystomutilla André, 1896 (Hymenoptera: Mutillidae: Sphaeropthalminae: Sphaeropthalmini), with description of the new genus Hemutilla gen. nov. and four new species from China, Zootaxa 3889 (1), pp. 71-91 : 87-89

Hemutilla cheni Tu et Lelej , sp. nov.

( Figs 11 A–H, 12A, 13)

Diagnosis. FEMALE. Clypeus triangular, posteriorly with thin transverse carina. Mesopleuron with dense, confluent punctures, except narrow, anterior area microgranulate. Metapleuron and propodeum laterally with deep, separate punctures. Metasomal tergum 1 posteriorly with wide tuft of golden setae, tergum 2 posteriorly and tergum 3 with about same length bands of golden setae. MALE unknown.

Description. FEMALE. Body length 8.0 mm. Head black, antenna dark ferruginous to black, scape, pedicel and flagellomere 1 obscurely ferruginous. Clypeus and mandible ferruginous, latter with dark apex. Mesosoma and legs ferruginous, femora, tibiae and tarsi apically more or less infuscated, spurs ferruginous. Metasoma black, sternum 1 basally dark ferruginous. Frons and vertex with sparse, suberect, fuscous setae. Mandible, clypeus and scape with sparse, long, yellow setae, gena with recumbent ones. Mesosoma dorsally with sparse, suberect, fuscous setae, propodeum posteriorly with sparse, erect, yellow setae. Pronotum laterally and inferior half of mesopleuron with dense, short, pale micropubescence. Tergum 1 with sparse, long, erect, pale setae, posteriorly with median tuft of golden setae, tergum 2 posteriorly and tergum 3 with about same length bands of golden setae. Felt line on tergum 2 yellow. Terga 4 and 5 with dense, recumbent, fuscous setae. Metasomal sterna with sparse, erect, yellow setae.

Relation of head width and mesosoma width 42:49. Mesosoma 1.3 × as long as broad. Mandible robust, apically bidentate, not excised beneath. Clypeus triangular, posteriorly with thin transverse carina. Eye subcircular, minimum distance between eyes 2.3 × eye diameter, distance between posterior margin of eye and that of head 1.8 × eye diameter. Frons, vertex and gena with dense, more or less confluent punctures.

Mesosoma pyriform, propodeum narrower than pronotum and mesonotum, relation of width at humeral angles, anterior spiracles, lateral mesonotal denticles, propodeal spiracles and propodeum 38:44:49:45:32. Mesonotum laterally with strong lamellate carina between pronotal and mesonotal spiracle tubercles. Mesonotum behind spiracle tubercles strongly convergent. Propodeal spiracles prominent, tuberculate. Mesosoma dorsally with dense, more or less confluent punctures. Pronotum laterally with shallow punctures. Mesopleuron with dense, confluent punctures, except narrow anterior area microgranulate. Metapleuron and propodeum laterally with deep, separate punctures.

Legs with sparse, erect, yellow setae. Mid and hind tibiae with 2 rows of 4-5 fuscous spines. Tibio-tarsal relations of hind leg 86:42:21:13:11:11.

Metasomal sternum 1 with Y-shaped carina, stronger anterad, indistinct posterad. Tergum 1 with deep, separate punctures. Tergum 2 with elongate, slightly confluent punctures. Segments 3–5 with fine, dense punctures, more or less confluent on sterna; sternum 2 with sparse, separate ones. Pygidial area elongate, glabrous, impunctate, carinate laterally, weakly convergent posterad.

Material examined. Holotype, ♀, CHINA, Fujian, Guadun, 7.X.1991, Chen Xuexin, No. 920210 ( ZJUH).

Distribution. China (Fujian).

Remarks. The female of this new species is similar to that of Hemutilla bifurcata (Chen) , but differs by having the clypeus posteriorly with a thin transverse carina (broad, flattened, V-shaped, strong ridge in H. bifurcata ), the tergum 1 posteriorly with a tuft of golden setae (fringe of fuscous setae in H. bifurcata ), the about same length bands of golden setae on terga 2 and 3 (that on tergum 3 much longer in H. bifurcata ).

Etymology. The specific name is dedicated to Prof. Chen Xuexin, who collected the holotype.

Figures

FIGURE 11. Hemutilla cheni sp. nov., ♀, holotype. A. Habitus, lateral view, B. Mesosoma, dorsal view, C. Pygidium, D. Metasoma, lateral view, E. Head, dorsal view, F. Head, frontal view, G. Head, lateral view, H. Metasoma, dorsal view. Scale line = 0.5 mm.