410 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



The salient subgeneric qualities are as follows: Anterior femora 

 mutic, integuments smooth, the form elongate and more or less 

 attenuate. 



Other characters of less diagnostic value may be mentioned: The 

 humeri are feebly developed, except in innoeens, where they are 

 distinct; the first joint of the anterior tarsi in the male is slightly 

 thickened at tip beneath and bears a small transverse tuft of yellowish 

 or brownish modified spinules, which interrupts the groove. 



The elytra are never caudate; tlie anterior tibial spurs are similar 

 in the sexes and usually subequal, although subject to a slight varia- 

 tion in their relative lengths, the anterior often appear slightly longer 

 than the posterior and both may be longer, slightly larger in the 

 female, but the males often exhibit this variation among themselves. 



The internal spurs of the meso- and metatibise are alwa^'s notice- 

 ably loiiger than the external. 



The abdomen is horizontal in the males of gigantea and gentilis, 

 slightly oblique in estriata and most so in mnocens; always hori- 

 zontal in the females. 



Suhgenei'ic genital characters^ male. — Apical lobe of the edea- 

 gophore triangular, dorsal surface broadly depressed and concave, 

 central area more or less membranous; apex blunt and not pro- 

 duced ; base broadly rounded at the middle third. 



Female. — Genital segment subparabolic and not setose, external 

 lobe of the apex obsolete, the internal chitinous and more or less 

 strongly developed, produced, convex above and excurved. 



Appendage minute and quite rudimentary. 



Dorsal plate of the valves elongate oval to subfalcate. 



Superior pudendal m^embrane broadly exposed by the distant dorsal 

 plates. 



In the form of the apices of the genital segment and the minute 

 appendages the present subgenus appears closely related to Disco- 

 genia. 



Distrihvtioii. — Glgantea occurs on the peninsula of Lower Cali- 

 fornia and in California as far north as the vicinity of San Fran- 

 cisco Bay in the north central part of the State. 



Gentills undoubtedly occurs in southern and central California ; 

 no definite locality has been recorded except San Diego. Specimens 

 collected at San Diego by Colonel Casey and others received from 

 Lower California by Doctor Horn, and therefore recorded from 

 definite localities, were not gentiUs at all, but either omlssa or its 

 race pygmaa. All specimens of gentills that I have seen had simply 

 a " Cal.'' label, and these were carefully compared with a LeContian 

 type by Mr. Blanchard and myself and the identification is correct. 

 The species probably occurs in Lower California. 



Estriata is only known from the San Franciscan peninsula and 

 adjoining region. 



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