162 DERMAPTERA AND ORTHOPTERA FROM SINALOA, MEXICO 



distal angulate emargination less decided, and styles more 

 slender and without as numerous or as stout hairs as are found 

 in that species. 



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

 1918. (J. A. Kusche.) [Hebard Collection, Type no. 7.56.] 



Size very small for the genus, smaller than E. orizabae (Saussure); form 

 moderately slender. Interocular space broad, very slightly narrower than 

 that between the antennal sockets. Maxillary palpi with fourth joint very 

 slightly shorter than third, fifth slightly shorter than fourth. Pronoturn 

 with surface weakly convex, showing a faint discal flattening caudad; outline 

 symmetrically rounded-trapezoidal, greatest width meso-caudad. Tegmina 

 and wings fully developed, extremely delicate in structure, numerous dis- 

 coidal sectors of the former oblique.^ Supra-anal plate' very strongly trans- 

 verse, free margin showing a broad convexity with median emargination 

 feebly suggested. Paired plate beneath supra-anal plate nearly symmetrical, 

 lamellate laterad, suddenly enlarged mesad. Concealed genitalia complex.* 

 Subgenital plate with surface moderately convex except before the styles, 

 where it is weakly concave; lateral margins broadly concave and weakly 

 oblique to styles, between these the distal margin is truncate in ventral 

 aspect, but angulate at sUghtly more than a rectangle in caudal aspect. 

 Styles situated on apices thus formed, very small rounded processes about 

 twice as long as broad, unarmed but suppUed with hairs. Limb armament 

 as described for the genus,' except that the ventro-caudal margin of the 

 cephalic femora has a median as well as a distal spine. 



Pronotal marking as in abortiva,^° with caudal margin and cephalic portion 

 of di.sk blackish brown, intervening band and margin of discal marking buffy, 

 lateral portions transparent, faintly tinged with brown. Tegmina very 

 delicately tinged with sudan brown, paling laterad. Head brussels brown, 

 paling on face, there obscurely mottled with buffy. Palpi, underi)arts anil 

 limbs ochraceous-buff, the abdomen weakly suffused with brown distad. 



Length of body, 6.8; length of pronotum, 2; width of pronotum, 2.6; length 

 of tegmen, 7.3; width of tegmen, 2..5 mm. 



The type of this striking but diminutive species is unique. 



^See generic description for other characters of venation. Mem. .Vmer. 

 Ent. Soc, no. 2, p. 26, (1917). 



'The dorsal surface of the abdomen can not safely be examined in tliis 

 unique specimen; it is probably uns])ecialized as in (ibortiva. 



*A whorl of sj)iniform hairs, suggesting those found in ahorliva, though 

 differently arranged, is visible. The genitalia can not be examined thoroughly 

 in this specimen. 



' In orizabae a very similar condition is shown, but in the Compsa Ciroup 

 of Euthlastoblatla a decided differeiuie occurs, the ventro-cephalic margin of 

 the cephalic femora showing a strong tendency toward the condition termed 

 tyi)c "A." 



lu Figured, Mem. Amer. Ent. Soc, no. 2, pi. i, figs. 1 and 7, (1917). 



