148 Coleopterological Notices, III. 



coarsely and rather densely so, the prosternum dull, finely and very densely 

 punctured. Legs slender, generally pale. 



Male. — Eyes separated by about three times their width. 



Length 4.3-5.9 mm. ; width 1.8-2.3 mm. 



California; Washington State. 



In both male and female the third and fourth joints of the 

 antennae are long, slender and equal, and the joints throughout are 

 but slightly shorter and thicker in the latter sex. The maxillary- 

 palpi are nearly as in sericea. 



The large series before me is exceedingly heterogeneous, not only 

 in color, but in general habitus, there being some specimens which 

 are broad, short and strongly convex, with the prothorax large and 

 at the base as wide as that of the elytra, and others which are 

 comparatively narrow, elongate and depressed, with the prothorax 

 much smaller. These differences seem to be independent of sex, 

 and surely indicate a mixture of closely related but distinct forms, 

 which the amount of material before me will not suffice to elucidate; 

 especially as there is marked uniformity in the antennas, sculpture 

 and other structural characters throughout the series. 



I. luscitiosa n. sp. — Rather narrowly oval, generally slightly broader 

 behind, dull, the elytra shining, dark piceous-brown throughout, the anterior 

 portions blackish ; pubescence fine, short, moderately dense. Head feebly, 

 evenly convex, very densely, rather coarsely punctate ; eyes very small and 

 unusually convex ; antennae slender, filiform, three-fifths as long as the body. 

 Prothorax nearly three-fourths wider than long, the sides broadly rounded, 

 almost straight and parallel toward base ; apex about two-thirds as wide as 

 the base, feebly arcuate ; base transverse, the sinuations broad and very 

 feeble ; disk extremely densely punctate, the punctures rather coarse ; basal 

 foveas widely impressed and feeble. Elytra about three times as long as the 

 prothorax, and, at or behind the middle, nearly one-half wider, the two bases 

 equal ; apex rather abruptly but acutely rounded ; disk finely but distinctly, 

 not extremely densely punctate, without trace of impressed striae or series 

 except the usual two near the suture, which are fine but deep toward apex. 

 Abdomen polished, very finely, rather sparsely punctate, the prosternum duller 

 and densely, more coarsely so. Legs slender, moderate in length, the basal 

 joint of the hind tarsi distinctly shorter than the remainder. 



Male. — Third and fourth joints of the antennae equal, each nearly twice as 

 long as the second ; eyes separated by about four times their own width. 



Length 4.0-4.3 mm. ; width 1.7-2.0 mm. 



California (Los Angeles). National Museum. 

 The antennae and maxillary palpi are nearly as in sericea and 

 variabilis, from both of which this species is at once distinguishable 



