Bruchidae

Napoles, Romero, de, Aracely, Cruz & Kingsolver, John M., 2009, Seed beetles (Coleoptera: Bruchidae) associated with Acacia cornigera (L.) Willd., with description of a new species of Acanthoscelides Schilsky, Insecta Mundi 2009 (93), pp. 1-11 : 2-3

Key to Bruchidae associated with Acacia cornigera in the New World

1. Basitarsus of hind leg more than two times longer than second tarsal segment; antennae serrate or pectinate; pygidium exposed behind elytra. Family Bruchidae ........................................... 2

— Basitarsus of the hind leg less than two times longer than second tarsal segment, antennae filiform; pygidium usually not exposed ............................................. Family Chrysomelidae

2(1). Lateral pronotal margin with a distinct, arcuate carina. Genus Stator .................................... 3

— Lateral pronotal margin lacking distinct carina ........................................................................ 4

3(2). Eyes flattened, nearly contiguous with lateral margin of head, posterior margins expanded and merging with lateral part of vertex ................................................. S. subaenus (Schaeffer)

— Eyes not flattened, posterior margins protruding laterally and well separated from vertex ........ .......................................................................................................... S. mexicanus Bottimer

4(2). Males usually with a channel on ventral surface of hind femur; mucro short, usually not as long as lateral denticle; median lobe of male genitalia with ventral valve not articulated or absent. Genus Mimosestes .................................................................................................................... 5

— Males usually without a channel on ventral surface of hind femur; mucro usually longer than lateral denticle; median lobe of male genitalia with ventral valve articulated. Genus Acanthoscelides ........................................................................................................................ 9

5(4). Prosternum separating procoxae for their entire length ...................... M. obscuriceps (Sharp)

— Prosternum separating procoxae for less than their entire length ............................................. 6

6(5). Lateral margins near apex of prothorax swollen, with strong spines and pronounced hump ...... ................................................................................................... M. nubigens (Motschulsky)

— Lateral margins near apex of prothorax not swollen, without strong spines ............................. 7

7(6). With uniform white or intermixed yellow and golden setae, without patterns; body usually reddish brown; internal sac of male genitalia with basal lagenoid sclerite .. M. cinerifer (Fahraeus)

— Pubescence uniform or with patterns .......................................................................................... 8

8(7). With two patches of white to yellowish setae on either side of midline about halfway from bases of pronotum and pygidium; cervical sulcus not prominent behind eye ..... M. viduatus (Sharp)

— Without setal patches on pronotum and pygidium; cervical sulcus prominent behind eye .......... ......................................................................................................... M. mimosae (Fabricius)

9(4). Lateral prothoracic carina extending from base half the distance to coxal cavity, lateral carina not expanding margins of prothorax; pronotum with inverted V-shaped stripe of dense yellow setae on midline flanked by narrow stripes of brown setae; eye 1.3-1.5 times as wide as width of frons ........................................................................................................... A. sousai Johnson

— Lateral prothoracic carina strong, extending from base 0.7 the distance to coxal cavity, carina on laterally expanded margins of prothorax; pronotum with uniform moderately dense golden setae; eye about two times wider than frons .................................................................................... 10

10(9). With long and straight mandibles, crossing at apex, bigger in females than males; mucro about one-sixth as long as first tarsomere; pattern of elytral pubescence not very contrasting; pygidium without V-shaped patch of dark setae ................................. A. oblongoguttatus (Fahraeus)

— With small, curved mandibles, not crossing at apex, same size in both sexes; mucro about twosixths as long as first tarsomere; pattern of elytral pubescence very contrasting; pygidium with V-shaped patch of dark setae ................................................................ A. sauli , new species