180 DERMAPTERA AND ORTHOPTERA FROM SINALOA, MEXICO 



cephalic margins, longer on caudal margins. Small distal pulvilli present on 

 the four proximal tarsal joints. Small arolia present between the bases of 

 the delicate, simple, s>Tnmetrical tarsal claws. 



Head and palpi blackish brown, ocelli buffy. Antennae blackish brown, 

 shading to hazel in distal fourth. Pronotum ferruginous, suffused with 

 carob brown between the latero-caudal sulci of the disk, this forming a poorly 

 defined, short, broad, V-shaped marking. Tegmina very weakly translucent, 

 dull carob brown, very narrow marginal field light ochraceous-buff, this con- 

 tinued along costal margin but narrowing and disappearing toward apex, 

 sutural margin of sinistral tegmen more broadly margined with ochraceous- 

 buff for an equal distance. In some specimens these marginal areas are 

 weakly suffused with tawny and are about equal in width. Abdomen and 

 cerci blackish brown. Limbs part pale and part dark, ochraceous-buff, often 

 tinged with tawny or blackish brown; ce]}halic coxae light with a jn-oximal 

 dark fleck, median and caudal coxae dark in nearly all of proximal half. 

 Trochanters and over proximal half of cephalic femora pale, remaining por- 

 tions dark; median and caudal femora similar but with less than proximal 

 half pale. Tibiae and tarsi dark, spines ochraceous-buff tinged with tawny. 



The measurements of the tjp^ are given first. Length of body, 

 10.5, 9.2 to 10.9; length of pronotum, 2.9, 2.7 to 2.9; width of pronotum, 

 3.3, 3 to 3.3; length of tegmen, 10. 9 to 10.3; width of tegmen, 3, 2.8 to 3.1 mm. 



In addition to the type, a series of five male paratypes, Ijearing 

 the same data but taken June 24 to July, 12, 1918, are before us. 



OXYHALOINAE 

 Chorisoneura anisoura-" new species (Plate VII, figure 8.) 



Belonging to the Pellucida Group, ^^ the present species is 

 smaller, with tegmina less elongate than the previously known 

 forms. In addition, the asymmetrical specialization of the 

 male styles is of a type hitherto unknown. 



Type. — cf; Venvidio, Sinaloa, Mexico. July 28 to August 1, 

 1918. (J. A. Kusche.) [Hebard Collection, Type no. 765.] 



Size medium large for the genus, decidedly smaller than in C. pellucida 

 Saussure; form depressed, in outline elliptico-ovoid. Head broad, decidedly 

 depressed; from the dorsum the occii)ut and cephalic half of the eyes arc seen 

 to be exposed, occipital outline truncate, the eyes not projecting beyond the 

 interocular area; interocular space broad, one and one-third times occipital 

 ocular depth, nearly four-fifths as wide as width between antennal sockets. 

 Maxillary palpi with fourth joint three-quarters as long as the elongate third 

 joint, fifth joint slightly shorter than fourth. Pronotum transverse elliptical, 



2^ From avtair^ -f- oupd, in allusion to the remarkably unequal styles of 

 the male subgenital plate. 



»» Erected and discussed, Mem. Amer. Ent. Soc, no. 4, p. 128, (1920). 



