386 MEMOIRS ON THE COLEOPTERA 



tate as a rule than those from the coast regions, though otherwise 

 nearly similar; they form, in fact, a very well marked variety of 

 tetrophthalmus, which may be designated subspecies iowensis nov. 



Tetrops Kirby. 



The small species of this genus are individually rather rare in 

 collections. They are allied to Tetraopes in general organization but 

 are narrower and more cylindric, the prothorax biconstricted but 

 only very feebly and broadly prominent at the sides, the elytral 

 punctures relatively coarser, denser and subserial and the antennal 

 joints beyond the fourth abruptly abbreviated; they also have some 

 affinity with Oberea of the preceding tribe. My two representatives 

 of canescens Lee., are from Kansas, and the single example of 

 jucunda Lee., from Pennsylvania. Monostigma Hald., having the 

 legs red, I have not seen. The following is allied to jucunda, but 

 can readily be distinguished as stated below: 



Tetrops expurgata n. sp. Form nearly as in jucunda and with nearly 

 similar fuscous vestiture and erect hairs, black, shining, the head and 

 prothorax throughout bright red, the latter without trace of dark central 

 maculation; legs and antennae black, the joints of the latter beyond the 

 iouith abruptly much abbreviated and pale brown in color throughout; 

 head finely, sparsely punctate, broadly and feebly concave between the 

 antennal tubercles; prothorax a fourth wider than long, parallel, the basal 

 constriction deep and confusedly punctate, the apical shallower, the 

 central callus feeble, only evident behind the anterior constriction and 

 with a few punctures, the surface elsewhere impunctate except in the 

 basal constriction; apical margin notably thickened; scutellum small, 

 triangular, with very few fine punctures; elytra shining, with series of 

 coarse oval perforate punctures, confused though only slightly smaller 

 apically, the sculpture as in Oberea; abdomen shining, sparsely punctu- 

 late and hairy; legs short and slender. Length (9) 7-7 mm.; width 

 2,2 mm. Indiana. Levette collection. 



Differs from jucunda in its slightly stouter form, coloration of 

 the antennae, the joints beyond the fourth in that species, as well 

 as canescens, being black or blackish, with only their extreme bases 

 paler, in the shorter and less punctate, wholly immaculate prono- 

 tum and in the coarser and less close-set elytral punctures, the inter- 

 spaces being more shining, owing to the much less evident, or in 

 fact barely traceable, fine subgranular sculpture of jucunda. 



The genus PJuza of Newman, is closely related to Tetrops and 

 bears a still greater resemblance in sculpture to Oberea, the antennas 



