Casey — A Revision of the American Paederini. 131 



prothorax very slightly wider than the head, but little longer than wide, 

 the sides parallel and nearly straight, the apical and basal angles nar- 

 rowly and subequally rounded, convex, the punctures fine, very sparse, 

 coarser in a more close-set series along the median smooth line, the 

 series wholly unimpressed; elytra slightly elongate, a fourth wider and 

 longer than the prothorax, the sides just visibly diverging throughout 

 and nearly straight, the punctures fine, rather sparse, arranged in some- 

 what close -set, broadly impressed series, except toward tip where 

 all sculpture becomes very feeble; abdomen broad, as wide as the 

 elytra. Male unknown ; female with the sixth ventral narrow, evenly 

 rounded at tip. Length 4.6 mm. ; width 0.88 mm. Colorado (Greeley). 



filicornis n. sp. 



A single specimen only of this species was received from 

 Mr. Wickham some years ago. 



Linolathra n. gen. 



The comparatively few known species of this genus have a 

 very distinct habitus, due to their small size, narrow and 

 rather convex parallel form, polished surf ace, with very coarse 

 and sparse elytral punctures, and distinct but not close-set 

 abdominal sculpture. They are strongly suggestive of Dac- 

 nochilus and are really much more closely related to that 

 genus than to Lathrotaxis or Lathrobiella. The four species 

 represented in my cabinet may be readily known as follows : — 



Head and abdomen black 2 



Head and abdomen pale in color 4 



2 — Tip of the abdomen rufous. Body parallel ; prothorax, elytra and legs 

 pale and bright rufous, the elytra not definitely darker toward base ; 

 head scarcely as long as wide, the sides subparallel and feebly arcuate, 

 the angles well rounded; base subtruncate, the neck scarcely half as 

 wide as the head; eyes convex, at rather less than twice their own 

 length from the base, the punctures somewhat coarse, very sparse; 

 antennae moderately thick, very feebly incrassate, distinctly longer than 

 the head and prothorax, the medial joints less than half longer than 

 wide; prothorax small, slightly elongate, somewhat narrower than the 

 head, the sides parallel and feebly arcuate ; anterior angles distinct, the 

 basal rounded, the punctures moderately coarse, forming one or two 

 shorter curved lateral series and a well marked close series along the 

 median impunctate area, the latter series impressed toward base; elytra 

 quadrate, parallel, much wider than the head, a third wider and nearly 

 a fourth longer than the prothorax, the punctures coarse, impressed, 

 sparse, disposed in three or four series, the sutural being very widely 

 separated from the next discal series; abdomen slender, much nar- 



