AMERICAN COLEOPTERA. 153 



1. P. in ii ii <1 mil u. sn. — Elongate, parallel, piceous, rather densely clothed 

 with short recumbent cinereous hair, with very short intermixed erect hairs 

 which are only visible in profile. Head ( % ) as wide as or a little wider than the 

 prothorax; eyes large, strongly convex, their vertical diameter a little greater 

 than half the width of the front; surface densely, finely scabrous, punctate and 

 dull. Antennae about four-fifths as long as the entire body, first joint elongate- 

 oval ; second short, rounded ; third to eighth strongly acutely serrate, the third 

 as wide as long, the following joints gradually longer, the eighth twice as long as 

 wide ; ninth to eleventh longer, linear, slightly increasing in length, the eleventh 

 about equal to the seventh and eighth united. Prothorax about one-third wider 

 than long, base broadly arcuate and a little wider than the apex, sides feebly 

 rounded, surface dull and densely punctulate, the sculpture indistinct, because 

 of the pubescence. Elytra obviously wider than the prothorax and four times as 

 long, finely, densely punctulate, with sparser scattered coarser punctures. The 

 pubescence in well preserved specimens is condensed in four narrow longitudinal 

 lines between which the surface is vaguely subsulcate. Beneath punctured and 

 pubescent as above but without the erect hairs. Length 4.5-6 mm. 



California, Redondo and Santa Monica. 



This species frequents the sand dunes overlooking the ocean and 

 is probably not rare. I have taken it from March to June in the 

 salt vats at Redondo, into which the insect had fallen while flying 

 about at night. All the specimens seen thus far with a single ex- 

 ception in Dr. Van Dyke's collection are males. This solitary 

 female differs from the male in its smaller eyes, in the head being 

 distinctly narrower than the prothorax and in its shorter less strongly 

 serrate antennae; these being barely half as long as the body, the 

 intermediate joints feebly obtusely serrate. The three outer joint- 

 decrease slightly in length instead of increasing as in the male, a 

 quite remarkable character. The prothorax is also more nearly 

 equal to the elytra in width and the last palpal joint is less acutely 

 pointed. 



Anobiini. 



This tribe includes those genera in which the head is received in 

 repose on the under surface of the prothorax, which is distinctly 

 excavated for its reception. The mandibles do not reach the meta- 

 sternum, the trunk is never excavated for the legs, and the contrac- 

 tile power is therefore far less developed than in the following tribes. 

 The form is always parallel and at least moderately elongate. Our 

 genera may be separated by the following table: 



Anterior coxse contiguous or narrowly separated, the prosternal process cuspi- 

 fonn, becoming laminate posteriorly (except in Oligumerns sericans and 

 0. tenellus) 2. 



TRANS. AM. ENT. SOC. XXXI. (20j MAY, 1905. 



