184 THE CANADIAN ENTOMOLOGIST 



converging toward the apex. Elytra nearly parallel on anterior two-thirds, 

 tapering thence to apex; rather coarsely scabrose over the entire surface; anai 

 style 3 mm. 



A single specimen, presumably a female, collected by the writer at Miller, 

 style long and slender. Length to end of the elytra, 2.5 mm., to end of the anal 

 Indiana, on August 29, retained in the writer's collection. 



This species seems most nearly allied to Mordfillistena sciiiinsfa Lee, differ- 

 ing in having the prothorax black, with a small ferruginous spot on the apical 

 angle; in having the humeral spot on the elytra distinct, and in the development 

 of a subapical pale spot. It should be listed immediately following Mordellistena 

 ustulata.. 



6. Mordellistena syiitaenia, sp. nov. 



Hind tibia with two ridges in male, with three in female; first joint of hind 



tarsus with three, the second with two ridges in both sexes; all ridges short and 

 somewhat indistmct. 



Body linear. Head black, with rather long and coarse sericeous-cinereous 

 pubescence; antennae black, with the four basal joints fusco-f erruginous ; mouth- 

 parts fusco-ferruginous ; prothorax black, with rather long coarse sericeous pu- 

 bescence ; elytra black, each elytron with two sericeous-cinereous stripes or vittae ; 

 one located near the suture, widening basally and there dividing to enclose a nar- 

 row black streak in the center; the other vitta narrow, located near the margin, 

 connected with the first at the base and apex, enclosing a broad black space on 

 the disc, and leaving the suture and lateral margin black ; under surfaces black, 

 covered with cinereous pubescence ; anterior legs ferruginous, becoming fuscous on 

 apex of the femora and tarsi ; middle legs a little darker ; posterior legs black, 

 becoming ferruginous on the tibial spurs. Head a little narrower than thorax, 

 closely and finely punctured. Antennae filiform, reaching nearly to base of 

 thorax; the first and second joints equal in length; the third a little shorter than 

 the second ; the fourth one-third longer and a little broader than the third ; the 

 fifth one-third longer and a little broader than the fourth ; the sixth to tenth 

 joints about equal in length; the eleventh longer than the tenth. Apical joint 

 of maxillary palpi securiform ; prothorax about as long as wide, its base as wide 

 as that of the elytra, widest at middle, its sides evenly rounded and slightly 

 converging to apex; base truncate or very slightly emarginate at middle; elytra 

 widest at middle and slightly tapering to apex, finely and closely punctured. The 

 inner edges of the femora and tibiae of the anterior legs bear long erect setae 

 in the male, but only fine hairs in the female; inner spur of posterior legs one- 

 third longer than the other. Anal style long and slender. Length to end of 

 the elytra 3 mm., to end of the anal style 4 mm. 



Twenty-three specimens examined : nine from Duxbury, Mass., June 27 ; 

 four from Framingham, Mass.. June 3 to July 4; six from Sherborn, Mass.. 

 May 25 to June 22; one from Natick, Mass, June 20; two from Southboro, 

 Mass., June 9, and one from Dummerston, Vt., July 14, all collected by Mr. 

 C. A. Frost. The male holotype and female allotype, from Duxbury, Massa- 

 chusetts, are placed in the writer's collection; paratypes in the collection of 

 Mr. C. A. Frost. 



The species is unlike all other North American forms of the genus, being 



