176 DERMAPTERA AND ORTHOPTERA FROM SINALOA, MEXICO 



scarcely darker than the median pale portion. The pronotum 

 is immaculate in all but a few females, where a pair of median 

 flecks of brown appear, varying froxn subobsolete to distinctly 

 indicated. The males average paler with pronotum and teg- 

 mina warm l^uff, the former often showing a faint greenish 

 tinge. The darker females have the pronotum largely ochrace- 

 ous-buff tinged with tawny, the mesonotum and metanotum 

 with extensive suffusions and all but narrow periphery of ab- 

 domen solidly chestnut brown, this showing through, particularly 

 caudad of the pronotal disk and mesad in anal fields of tegmina 

 when they are at rest. Two flecks of dark brown are found 

 distad on each tegmen, these are very greatly reduced but 

 persist even in the males of maximum recessive coloration. 



Nauphoeta cinerea (Olivier) 



1789. BItitin cinerea Olivier, Encycl. Method., Ins., iv, p. 314. [Adults 

 and juv.; ''L'lle de France" (= Mauritius).] 



Rosario, 2 small juv. 



CORYDIINAE 

 Holocompsa scotaea new species (Plate VII, figures 2 to 5.) 



Closely related to H. nitidula (Fabricius), the present species 

 differs in the slightly more metallic blue-black general colora- 

 tion, solidly darkened transparent portions of the tegmina and 

 decidedly less contrast in coloration between the sexes. In 

 scotaea the male has the pronotum dark, with small areas of 

 tawny latero-cephalad, the female has the pronotum dark, 

 with lateral portions ochraceous-tawny. Recession in coloration 

 apparently results in the pronotu.ai of females being sometimes 

 ochraceous-tawny laterad and cephalad, the dark portion re- 

 duced to a roughly triangular area meso-caudad, occupying 

 only a third of the pronotal surface. 



Tyiie. — d^; Venvidio, Sinaloa, Mexico. June 24, 1918. (J. A. 

 Kuschc.) [Hcbard Collection, Type no. 763.] 



Size very small, slightly larger than nitidula; form elliptical, tegmina and 

 wings projecting slightly beyond apex of abdomen. Head fully as broad as 

 long, eyes very widely separated, above not extending inward beyond antcnnal 

 V)ases; ocelli minute, oval, with surfaces convex; occiput supplied with minute 

 hairs, these fewer on face, which shows a weak vertical linear sulcus mesad. 

 Pronotum as in nitidnla; tliickly sui)])lied with minute procuinbcut hairs and 



