126 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



ments densely clothed with recumbent, whitish or yellowish pubes- 

 cence ; pygidium coarsely punctate, strongly carinate, the carina pro- 

 jecting and truncate at apex. Prosternum sparsely, coarsely punc- 

 tate, and sparsely clothed with short, recumbent, whitish hairs; 

 prosternal lobe broad, slightly declivous, and broadly rounded in 

 front ; proternal process broad, surface more or less concave, and the 

 sides parallel to behind the coxal cavities, then obliquely narrowed 

 to the apex, which is acute. Tibiae slender, anterior pair feebly 

 arcuate, anterior and middle pairs with a distinct tooth on the inner 

 margin at apex, the posterior pair simple. Posterior tarsi distinctly 

 shorter than the tibiae, and the first joint about equal in length to 

 the following three joints united. Tarsal claws dissimilar, anterior 

 and middle ones cleft near the tip (middle ones slightly deeper), 

 and the teeth nearly equal in length ; posterior claws cleft near mid- 

 dle, the inner tooth shorter than outer one, and slightly turned 

 inward, but the tips distant. Genitalia similar to those of acutipen- 

 nis Mannerheim. 



Female. — Similar to the male, but the front of head is wider, more 

 convex, longitudinal groove slightly more deeply impressed, and the 

 sides more parallel; antennae slightly shorter, eyes narrower, and 

 equally rounded above and beneath; abdomen beneath more finely, 

 sparsely punctate, and the second segment not grooved at the middle ; 

 tooth at apex of anterior and middle tibiae shorter and less distinct, 

 and the claws alike on all feet, similar to those on the posterior feet 

 of the male. 



Length, 7.5-11 mm.; width, 2-3.25 mm. 



Type locality. — Massachusetts (probably Tyngsboro). 



Other localities. — Connecticut: Lyme. Massachusetts: Sherborn, 

 North Saugus, Stoughton, Springfield, Framingham, and Melrose 

 Highlands. 



Type, allotype, and paraty pes. —Cut No. 40995, U.S.N.M. Para- 

 types in the collections of C. A. Frost, W. J. Chamberlin, and W. 

 Knaus. 



Described from 15 specimens (one type). Type, allotype, and one 

 paratype labeled "Mass (Blanchard)" probably from Tyngsboro; 1 

 from Sherborn, Mass., June 3; 1 collected at Stoughton, Mass., on 

 ^,iay 27 by D. H. Blake; 2 collected at North Saugus June 16 by 

 E. A. Back; 3 collected at Springfield, Mass., during June by E. A. 

 Chapin; 1 from Melrose Highlands, Mass., collected on June 3 by 

 D. H. Clemons; 2 collected at Framingham, Mass., during June by 

 C. A. Frost ; 1 unlabeled from the Melsheimer Collection ; and 1 col- 

 lected at Lyme, Conn., May 16 on Betula lenta Linnaeus by the 

 writer. 



This species resembles criddlei Frost very closely, but can be sep- 

 arated from that species by having the vertical portions of the 



