160 DERMAPTEEA AND ORTHOPTERA FROM SINALOA, MEXICO 



' The eyes are comparatively large, equalling the cheeks in 

 length. In the male the short pygidium with minute lateral 

 projections and truncate apex, and the forceps unarmed except 

 of a minute proximo-internal tooth, are distinctive. In general 

 form of pygidium nearest agreement with Mimilis is shown, 

 that species, however, having the pygidium without lateral 

 projections and with apex much narrower. The same is true 

 of the female forceps also, in which, however, the flange of the 

 internal margin, conspicuous in incerta and flavipennula, has 

 become subobsolete. 



Type. — cf ; Venvidio, Sinaloa, Mexico. June 30 to July 3, 



rl918. (J. A. Kusche.) [Hebard Collection, Type no. 754.] 



Size medium small of the genus; form moderately depressed, slender. 

 Head with occiput flattened but not impressed, cheeks as long as eyes. An- 

 tennae with first segment large, broadening just before median point; second 

 minute; third slightly shorter than first ;^ foiu'th decidedly shorter; succeed- 

 ing segments increasing strongly and regularly in length distad. Pronotum* 

 distinctly longer than broad, smooth, with a medio-longitudinal linear sulcus 

 very feebly indicated; rectangulate cej)halad, broadly convex truncate caudad; 

 lateral margins straight, showing an almost imperceptible divergence caudad; 

 prozona tumid, this becoming very weak caudad; metazona deplanate. Teg- 

 mina smooth, with distal margin truncate, weakly oblique; wings with ex- 

 posed area nearly one-haK as long as tegmen. Abdomen with glands very 

 weakly developed; surface of abdomen polished, almost smooth, rugulose 

 condition subobsolete. Ultimate tergite smooth, length slightly less than 

 half its width, showing a weak triangular depression meso-distad, caudal 

 margin transverse with a very feeble concavity about the pygidium. Pj^gid- 

 ium small, about as wide as long, declivent with surface convex, lateral 

 margins very weakly convergent, terminating on each side in a minute point, 

 beyond more strongly convergent and weakly convex to median third of this 

 portion which is truncate. Forceps parallel to their apices which are incurved; 

 showing a shght flattened production of dorso-internal margin at end of 

 proximal two-fifths, the shaft, from that point distad, more decidedly flattened 

 distad than i)roximad; internal surface granulate except distad, with a minute 

 proximal tooth mesad above the median point of the; pygidium on each side. 

 Penultimate stcrnite ami)le, less than twice as broatl as long, with latero- 

 caudal angles broadly rounded and distal margin transverse, fringed with 

 closely placed, short, microscopic hairs. Caudal metatarsus as long as last 

 joint, hairy ventrad with a fringe of lamellae on veiitro-iiiternal margin. 



^ This is also true of the paratypes of huitdii.s in the author's collection. 

 - This is taken from the allotype, as the i)ronotum is deformed in the type. 



