122 Trans. Acad. Sci. of St. Louis. 
elytra, finely, closely punctate and slightly shining. Male unknown; 
female with the sixth ventral abruptly pale in color, more convex and 
broadly rounded at tip. Length 5.6 mm.; width0.8mm. Washington 
ee so a ou op eawe ba Weta bale sake Thiel ou an aeen bipartitum n. sp. 
European species, such as bicolor Er. and picipes Er., have 
the head much more rounded at base, the eyes smaller and 
the antennae very much more slender and elongate than any 
of these American forms, and it is possible that the latter 
may be generically or subgenerically separated at some time in 
the future; at present they seem most fittingly placed in 
Lobrathium, which is not by any means a subgenus of 
Lathrobium. 
Lathrotaxis n. gen. 
The species of this genus are of larger size than any of 
those which follow in the Lathrobia, comparing well in 
stature with the less numerous and far more localized Lathro- 
tropis. The body is parallel and rather depressed, the coarse 
punctures always very sparse, except on the abdomen, where 
they are fine and close-set but not so dense as to give the dull 
and lustreless appearance characterizing most of the subsequent 
genera and resembling Linolathra more in this respect. The 
strongly marked anterior ungles of the prothorax, in connec- 
tion with the broad depressed form, shining surface and 
sparse, coarse sculpture, give to the members of Lathrotaxis 
a peculiar and pronounced habitus, differing greatly from the 
three genera immediately preceding but imitated in the minute 
forms constituting the genera Pseudolathra, Linolathra and 
others of this group. The thirteen species in my cabinet are 
distributed over the entire region north of Mexico and below 
the Canadian boundary, but are notably more abundant in 
the south and represented by only one or two species in the 
northeastern states, where Lathrobium and Lathrobioma are 
so abundant; they may be readily identified by the following 
outline descriptions : — 
Body black or piceous-black, with the elytra and sometimes also the pro- 
thorax, PAleTsccescceccscccoccee cccrshucresescescvvcs scvsseease recs 2 
Body black throughout.....e..sececcsercnceecs Neo e14 piled a a palin aca Ma TS wn ae 11 
