14 MEMOIRS ON THE COLEOPTERA. 



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laterally, the angles nearly right and distinct; surface not impressed 

 basally; elytra rather transverse, parallel, the suture just visibly longer 

 than the pronotum, the apical sinuses rather pronounced; abdomen 

 rather long, perfectly parallel, evidently narrower than the elytra, the 

 fifth tergite distinctly longer than the fourth. Length 2.8 mm.; width 

 0.7 mm. Iowa (Iowa City), H. F. Wickham. 



The single type in my collection is a female but represents a 

 species differing in many directions from the preceding or laticolUs, 

 as may be inferred ; in the latter the elytra are relatively very much 

 longer. Wickhami is taken in company with a brown ant about 

 4 mm. in length, having two spines transversely placed on the 

 metathorax and two nodular segments composing the abdominal 



peduncle. 



Acrimea n. gen. 



This genus is related to both Thiasophila and Ischnoglossa, but 

 differs from the former in having no trace of the constrictional 

 division of the last antennal joint and from the latter in the form of 

 the abdomen, which at base is as wide as the elytra, gradually 

 tapering thence to the apex; and from both it differs in the very 

 convex prothorax and character of the abdominal sculpture, the 

 punctures being finer and each having two short fine feebly diverg- 

 ing incised lines proceeding posteriorly therefrom. The general 

 form of the body is stout as in Thiasophila. The following are 

 three very clearly defined species of this purely American genus: 



Acrimea resecta n. sp. Stout, moderately convex, rather shining 

 throughout, finely, closely, asperately punctate, the abdomen more 

 finely and less closely, the pubescence short, somewhat fine, subde- 

 cumbent, pale and distinct though not very dense; body dark red-brown, 

 the elytra but little paler, the head and abdomen slightly darker, except 

 at the apices of the segments; head nearly as long as wide, more orbicular 

 than in the preceding genus; eyes moderate, not at all prominent; 

 antennae short, pale, rapidly and very strongly incrassate, the second 

 joint much shorter than the third, fourth slightly elongate, the tenth 

 twice as wide as long, the last short, conoidal, as long as the two preceding, 

 not bipartite; prothorax strongly transverse and convex, much wider 

 than the head, distinctly wider than the base and as wide as the apex 

 of the elytra, the sides subparallel and evenly arcuate, the truncate apex 

 almost as wide as the broadly arcuate base, the basal angles obtuse and 

 somewhat blunt though evident; surface very evenly and strongly con- 

 vex and distinctly shining throughout, not at all impressed; elytra short 

 and transverse, the sides feebly diverging and arcuate, the suture not 

 quite so long as the prothorax; abdomen large, at base virtually as 

 wide as the elytra, the sides thence feebly converging and straight, 



