476 CALIFORNIA ACADEMY OF SCIENCES. 



very slightly wider than long, almost exactly similar to that of robustulum, 

 except that the transverse basal groove is at scarcely more than one-fourth 

 the length from the base. Elytra at the prominent humeri distinctly wider 

 than the prothorax; sides feebly divergent, strongly arcuate; disk convex, 

 about as long as wide; sutural striae strong, arcuate; discal fine, distinct, 

 terminating at the middle of the disk. Abdomen very slightly shorter and 

 much narrower than the elj'^tra, longer than wide; sides nearly parallel, 

 straight, except in the apical fourth, which is parabolically rounded; basal 

 carinee less than one-third as long as the segment, fine, exactly parallel and 

 straight, separated by slightly less than one-third the abdominal width. 

 Legs rather short and slender. Length 1.2 mm. 



California (Anderson Yal., Mendocino Co. 1). 



This species is very closely allied to the preceding, the 

 type specimen, which is apparently a female, is smaller, 

 much narrower, with a narrower, much more elongate abdo- 

 men and larger head. The form and position of the basal 

 carinse differ in the two species, being distinctly stronger 

 and divergent in rohustalum, and finer and perfectly parallel 

 m testaceum. Were it not for this character and the proba- 

 bility — because of the sexual characters — of the masculinity 

 of the small-headed type of rohustidum, I should be per- 

 suaded to unite the two as very extreme specimens of a 

 single species, but at present this does not appear to be ad- 

 missible. Although both are from the same region, the 

 localities in which they were taken were widely different. 



The four species thus far described differ from caUforni- 

 citm, as described by LeOonte, in the extent of the discal 

 strise, these being two-tliirds as long as the elytra in the 

 latter. The number of species is probably considerable, as 

 scarcely any organized attempt has been made to collect 

 them. 



EUPLECTUS Leach. 



E. californicUS ^- sp. — Form slender, paiallel, depressed; dark testa- 

 ceous throughout, polished; pubescence fine, rather short, somewhat dense. 

 Head rather large, slightly wider than long; eyes small, convex, rather 

 prominent, at more than their own length from the base; geu£e rounded, 

 convergent, not prominent; base broadly sinuate; surface depressed, 

 coarsely, deeply and rather densely punctate; having on a line through the 



