io MEMOIRS ox THE COLEOPTERA. 



Atheta (Macroterma) iowensis n. sp. As small as dentata and relatively 

 narrower and more parallel, the antennae much larger, stouter and more 

 incrassate, the eleventh joint less acutely pointed; black, the elytra and legs 

 pale piceo-flavate ; antennae blackish throughout; head distinctly narrower 

 than the pro thorax, the eyes less prominent than in dentata; prothorax 

 nearly as in that species, shorter than in alutacea and borealis, transverse, 

 parallel, evenly rounded at the sides, finely punctulate and moderately 

 pubescent; elytra large, slightly transverse, with feebly diverging sides, 

 distinctly wider and very much longer than the prothorax; abdomen moder- 

 ately narrow, parallel, the fifth tergite (cf) with a very small and sharply 

 elevated tubercle close to the hind margin and more posterior in position 

 than the somewhat similar tubercle of dentata, the sixth tergite with a slightly 

 projecting and broadly arcuate apical lobe, about a third as wide as the basal 

 width of the segment, the lobe with two short carinse separated by a concavity 

 at each side of its surface, the median part more arcuate and with a minute 

 median sinus at apex, the segmental apex at each side of the lobe unevenly 

 crenulate and wrinkled. Length 2.7 mm.; width 0.7 mm. Iowa (Iowa 

 City), Wickham. 



The specimens at hand are gummed alongside of a large black 

 ant, having the pedunculated abdomen relatively very stout, but 

 it is hardly assumable that the beetle and ant are associated very 

 closely. 



Homalotusa Csy. 



This subgenus, composed of rather large species with long and 

 not much incrassated antennae, in which the outer joints are more or 

 less elongate, the eleventh much shorter than the two preceding 

 combined, the mesosternal process extending almost to the middle 

 of the coxae and very acute, the metasternal projection very short 

 and broadly angulated, the coxae contiguous, the abdomen parallel 

 and devoid of evident sexual modification, may be placed near 

 Liogluta. The following are some additional species: 



Atheta (Homalotusa) lanei n. sp. Unusually stout, piceous-black, the 

 abdomen black; legs pale, the antennae fuscous; pubescence distinct but not 

 dense, rather pale, very sparse on the abdomen; lustre shining; head trans- 

 versely orbicular, the strongly setose eyes not very prominent, at their own 

 length from the base; antennae extending to the middle of the elytra, the 

 tenth joint slightly elongate; prothorax nearly a third wider than long, much 

 wider than the head and correspondingly narrower than the elytra, parallel, 

 with rounded sides, rather convex, minutely, sparsely punctulate but flat- 

 tened and with closer granuliform punctures medially toward base, with a 

 short transverse impression just before the base; elytra large, slightly wider 

 than long, very much wider and longer than the prothorax, impressed on 

 the suture basally, rather closely, granularly punctate; abdomen slightly nar- 

 rower than the elytra, remotely punctulate, the fifth tergite fully as short 



