THE CANADIAN ENTOMOLOGIST. 279 



ihe four perforate basal foveae well developed ; sutural stria fine, the 

 others obsolete ; abdomen about as long and wide as the elytra, 

 the basal segment slightly longer than the second, with a basal 

 impression in fully median half Length, 1.4 mm.; width, 0.5 mm. 

 Mississippi (Vicksburg), [New Orleans, — \.tcox\iQ^^. .ifiscu/ptiis, Lee. 

 Form similar but much smaller in size, the head similar, except that 

 the fove?e are smaller and feebler and the anterior pit small, feebler 

 and transversely oval, the frontal edge not fine and acute, but low and 

 broadly convex as usual ; occipital carina finer and shorter, the 

 antennae nearly similar ; prothorax smaller and less transverse, very 

 distinctly narrower than the head ; elytra more distinctly shorter 

 than wide, not as long as the head and prothorax, and only a third 

 wider than the former, otherwise similar, the median discal impres- 

 sion, in neither case striiform, extending rather further from the base; 

 abdomen about as wide as the elytra and very evidently longer. 

 Length, 1.25 mm.; width, 0.42 mm. Missouri (St. Louis). 



hirstdus, n. sp. 



3. Prothorax small, much narrower than the head 4 



Prothorax larger, subequal in width to the head 6 



4. Head larger, moderately transverse, the eyes small, at about twice their 



own length from the base, the first antennal joint thicker, as long as 

 the next six, as wide as the second and fully half as wide as the 

 eleventh, its upper surface punctato-rugulose and hairy, the long 

 erect hairs of its under surface conspicuous ; frontal pit small, trans- 

 verse, the depressed frontal margin thick and convex, granulose ; 

 surface strongly granose laterally ; prothorax distinctly transverse, 

 smooth, convex and polished, tumid and strongly granose 

 basaliy, also in and near the anterior stricture, having tb.e 

 usual sulci and disconnected basal foveae; elytra distinctly shorter 

 than wide, much shorter than the head and prothorax, 

 scarcely a third wider than the head, the sides diverging and 

 arcuate, the humeri feeble, the discal impression short and broad, 

 not quite extending to basal third, the surface minutely, sparsely 

 asperulato-punctate ; abdomen fully as wide as the elytra and 

 evidently longer, the basal impression in median half abruptly and 

 obliquely limited at the sides. Length, 1.3 mm.; wndth, 0.5 mm. 

 District of Columbia ruber, n. sp. 



