98 Trans. Acad. Sci. of St. Louis. 



median area in basal three-fifths, where they are linear; elytra large, 

 parallel, distinctly elongate, a third wider and one-half longer than the 

 prothorax, the punctures similar in size to those of the pronoluin but 

 feebler, close-set in rather even unimpressed series throughout; basal 

 angles not rounded; abdomen parallel, narrow, straight at the sides, 

 only three-fourths as wide as the elytra, the fine punctulation not 

 dense; legs slender. Male with the surface of the fifth and sixth seg- 

 ments wholly unmodified, the apex of the fifth rectilinearly trunctate, 

 becoming very feebly sinuate in the median third or fourth, the sixth 

 narrow, broadly rounded at tip, with a deep sinus about a third as wide 

 as the apex, apparently rather deeper than wide and parabolic in form ; 

 female not known. Length 4.6 mm. ; width 0.75 mm. Texas. 



tcxana n. sp. 



I have seen but a single specimen of this very delicate spe- 

 cies and it is from an unrecorded part of the state. 



Lathrobioma n. gen. 



The species of this genus in their dense integuments, gen- 

 eral form of the body, large head, and, especially, in their 

 thick submoniliform antennae, greatly resemble Lathrobium, 

 but the formation of the posterior tarsus prohibits any such 

 association, the tarsi being shorter and more compact, with 

 the four basal joints subequal and mutually similar, each having 

 in general two long oblique setae projecting anteriorly from the 

 anterior margin beneath, the fourth joint sometimes a little 

 smaller, the first about as long as the second and not elongate, 

 not obliquely produced beneath the base of the second and 

 without trace of the expanded sole characterizing Lathrobium ; 

 the fifth joint is frequently nearly as long as the first four 

 combined. The species are smaller than those of Lathrobium, 

 comprising some of the more minute of the Lathrobia, 

 have smaller eyes and are more slender as a rule. They ex- 

 tend over the same geographical range in America, to which 

 region they may possibly be confined, and are moderately 

 numerous, those represented in my cabinet being distinguish- 

 able as follows : — 



Elytra larger, as long as the prothorax or longer and notably wider, the body 

 broader and less convex; elytral punctures more or less irregularly 

 lineate in arrangement 2 



