H. C. FALL. 135 



obtuse; median sulcus faint, basal transverse impression strong, margins a little 

 ex pi an ate, not distinctly serrulate. Elytra elongate-oval, stria?, distinctly im- 

 pressed, the punctures coarse toward the base, intervals distinctly convex toward 

 the base, less so apically. Mesosternum longitudinally rugose, metasternum 

 with long, rather coarse, subparallel ruga?, which reach nearly to the hind mar- 

 gin. Abdomen im punctate, the first segment without rugae. All the tibiae dis- 

 tinctly mucronate internally at the apex in the male, but the inner margin is not 

 visibly serrulate. Length 1.75 mm. 



Hub. — California. A single male without definite locality in the 

 Horn collection. 



CARTODERE Thom. 



The small size, narrow or even linear often subdepressed form, 

 the elytra with approximate rows of large rounded perforate punc- 

 tures, give to the members of this genus a characteristic facies which 

 can scarcely be mistaken. As heretofore constituted, the genus is in 

 several points of structure quite polymorphic, and as represented 

 with us the species are only fairly homogeneous, even after the 

 removal of watsoni and tmicostata, each of which I have made the 

 type of a distinct genus. The reasons for so doing are given else- 

 where, and are based on certain structural peculiarities which must 

 have been entirely overlooked by the European authors, as they are 

 too important to have been passed over in silence if observed. As 

 here restricted the species of our fauna exhibit the following char- 

 acters, in addition to those of general facies above mentioned : Head 

 subtriangular or trapezoidal, usually distinctly longer than wide; 

 antennse shorter than the head and prothorax, inserted far in ad- 

 vance of the eyes, which are small or even minute, club (except in 

 jilum and intermedia) 3-jointed, abrupt. Prothorax without costse, 

 more or less deeply transversely impressed posteriorly (except quad- 

 rlfoveolata). Scutellum indistinct, elytra each 6-8 punctate-striate. 

 Surface beneath, at least of the metasternum and abdomen, impunc- 

 tate (except elegans) ; side pieces of metasternum not visible, the 

 sutures apparently obliterated ; ventral segments five in both sexes, 

 the sutures deep. Front and middle coxse always distinctly sepa 

 rated, the former sometimes rather narrowly, the latter always more 

 widely. Legs short and stout, first two tarsal joints short, subequal. 

 In all our species except ruficollis, the elytral intervals bear sparse, 

 fine, excessively short erect hairs, which are, in most cases, only 

 visible when the elytra are viewed in profile. External sexual char- 

 acters have been noticed only in elegans and costalata. In the 

 former the front and middle tarsi are 2-jointed in the male ; an 



TRANS. AM. ENT. SOC. XXVI. NOVEMBER, 1899. 



