Casey — A Revision of the American Paederini. 133 



rounded and not acute as in the preceding species, the shallow and 

 broadly rounded apical sinus nearly similar, fully three-flf ths as wide as 

 the apex. Length 4.4 mm.; width 0.65 mm. Virginia, Tennessee, 



Mississippi (Vicksburg) and Texas (Austin) iilit arsis n. sp. 



4 — Body slender, polished, pale yellowish-testaceous in color, the abdomen 

 sometimes slightly piceous with the apex broadly rufescent; head 

 parallel at the sides, the angles obtuse but only slightly rounded, the 

 base arcuate, the punctures fine and very sparse; antennae as long as 

 the head and prothorax, rather slender and only very feebly incrassate 

 distally; prothorax slightly elongate, only just visibly narrower than 

 the head, the sides subparallel and nearly straight, the apical angles 

 very narrowly, the basal broadly, rounded; surface with a few coarse 

 punctures forming an arcuate series near the sides anteriorly and 

 others forming the usual series bounding the median impunctate area; 

 elytra distinctly elongate, subparallel, two -fifths wider and a third 

 longer than the prothorax, the punctures fine and extremely sparse, 

 arranged in a few series as in the preceding species; abdomen slightly 

 narrower than the elytra, more minutely and more closely punctulate 

 than in fi litarsis and the other species. Male not at hand ; female with 

 the sixth ventral very broadly and feebly rounded behind. Length 4.0 

 mm. ; width 0.62 mm. Arizona (Tucson) litnaria Lee. 



The species described by Say under the name Lathrobium 

 dimidiatwn, is improperly identified in our cabinets, the 

 name being applied to the species called Jilitarsis in the table. 

 Filitarsis appears to be rather inconstant in other respects 

 than the coloration of the elytra, for example in the conver- 

 gence of the sides of the head behind the eyes, some examples 

 having the sides parallel without regard to sex. The male 

 sexual characters, are, however, virtually constant, and so no 

 division can be attempted. Dr. Sharp records dimidiata from 

 Mexico, but the species is probably not the same, although 

 congeneric, as may also be the case with pusilla Shp., from 

 Tabasco. 



Latlirobiella n. gen. 



This genus is the most extensive of the plicate Lathrobia 

 and is composed of small species, frequently closely allied 

 among themselves. It has the same geographical distribution 

 as Lathrotaxis, although inclined to a more northern range, 

 and, up to the present time, is wanting as far as known in 

 California, where Lathrotaxis is represented by a single very 

 isolated species, atronitens belonging to the Sonoran fauna 



