74 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



which is acute. Posterior coxae with the posterior margin deeply, 

 broadly, arcuately emarginate, and the exterior angle rectangular. 

 Tibiae slender, straight, and all three pairs armed with a long tooth 

 on inner margin at apex. Posterior tarsi not quite as long as tibiae, 

 and the first joint as long as the following joints united. Tarsal 

 claAvs similar on all feet, cleft at middle, the outer tooth acute at 

 apex, the inner one slightly broader, turned inward, and the tip 

 sometimes touching that of the opposite side. 



Length, 4.25 mm. ; width, 1.125 mm. 



Female. — Differs from the male in having the front of head 

 brownish cupreous or aeneous, slightly more convex, and the surface 

 less densely pubescent anteriorly; antennae extending slightly be- 

 yond middle of pronotum, without long hairs beneath, and the outer 

 joints not longer than wide; pronotum more uniformly bronzy 

 brown; beneath usually more bronzy brown, the first and second 

 abdominal segments convex at middle, and all of the tibiae unarmed 

 at the apex. 



Redescribed from the male lectotype No. 3475 in the Academy of 

 Natural Sciences, Philadelphia, and of the female, from a specimen 

 taken together with a male by J. C. Bridwell. 



Type locality. — Mount Tom, Tyngsboro, Mass. 



DISTRIBUTION 



Material examined: 



Illinois: Willow Springs, July 1: Riverside, June 6, (E. Liljeblad). La 

 Grange ( ). 



Maine: South Paris (C. A. Frost). 



Maryland: Plummer Island, May-June (R. C. Shannon). Jackson Island, May 

 22, at light (Barber and Shannon). 



Massachusetts: Tyngsboro (Blanchard). Framingham (Frost). 



New York: Oleott, July 4 (H. Dietrich). Albany, May-June ( ). 



Ohio: Cincinnati, May 29 (Dury). 



Pennsylvania : Inglenook, June 2 ; Charter Oak, June 21 ; Hununelstown, May- 

 June (Knull). Jeannette (II. G. Klages). Duncannon, June 24 (J. G. 

 Sanders). 



Virginia: Chain Bridge. June 5 (J. C. Bridwell). Dead Run, May 18 (R. C. 

 Shannon). 



West Virginia: Harpers Ferry. June 19 (Hubbard and Schwarz). 



Also recorded from : 



Indiana: (Chamberlain), but Blatchley (1910) states it has never been reported 



from this State. 

 New Jersey: Newark (H. B. Weiss). 



Variations. — Rather uniform in size, but the color is quite variable. 

 The head varies from a brillant dark blue to a bronzy or greenish 

 blue, and the middle of the pronotum bronzy brown to nearly black, 

 with the sides varying from blue to bronzy green. Sometimes the 



