H. C. FALL 377 



Prothorax distinctly narrowed in front, sides rounded posteriorly, rather 

 coarsely somewhat unevenly punctate, the sides at most very narrowly or 

 indistinctly smoother, the pale margin narrowed behind, and sometimes al- 

 most lacking. 



Elytra more minutely alutaceous and somewhat less o})afiue than the pro- 

 thorax, coarsely rather densely punctate, with more or less impressed striae 

 at sides and rear; one or two narrow slightly elevated discal costae usually 

 visible in the female; shield inconspicuous; marginal interspace wide, i)unc- 

 tate, more numerously so basally. 



Pygidium, body beneath and legs black, the latter oftcni with the tibiae 

 piceo-testaceous, especially of the anterior legs; base of femora sometimes 

 gradually paler. Front claws of male quite noticeably enlarged though less 

 strongly so than in limbatus. 



Length 2.75 to 3.25 mm.; width 1.4 to l.S mm. 



Distribuf'ion. — Ma-'isachusetts: Melrose Highlands, May 23 (D. H. demons 

 in Nat. Mus. Coll.); Marion, June 17 (Bowditch); "Mass." (many collections). 

 Connecticut: (no definite locality). Nexv York: New York City and vicinity 

 (Leng); Staten Island (Soltauin Nat. Mus. Coll.); Peekskill, May (Sherman). 

 New Jersey: Orange (Soltau); Spotswood (Leng); So. Orange, June 22 (Leng); 

 Atco, June 2 (Boerner) ; Da Costa, June 12 (Wenzel) ; "N. J." (Liebeck) ; Wood- 

 bury (Wenzel). Pennsylvania: Allegheny, May and June (Hamilton); Jean- 

 nette (H. G. Klages); Pa. (Liebeck). Maryland: Plummer's Island, May 

 (Schwarz and Barber). District of Columbia: Washington, May IG (Hubbard 

 & Schwarz). Virginia: (Beyer). Ontario: (Nat. Mus. Coll.). Michigan: 

 Detroit, June and July (Hubbard & Schwarz). Ohio: Cincinnati (Durj-); 

 "Ohio" (Liebeck Coll.). Kentucky: near Cincinnati,*June 21 (Dury); Frank- 

 fort, June G (Soltau in Nat. Mus. Coll.). Indiana: (Liebeck Coll.); Blatchley 

 gives "Marshall, Vermillion and Lawrence Cos.; scarce May 11-June 14." 

 Illinois: So. 111. (Nat. Mus. Coll.). Missouri: C. Mo. (Nat. Mus. Coll.); 

 St. Louis (Nat. Mus. Coll.); Mo. (Liebeck Coll.). Louisiana: ()pelou.sas, 

 Aju. 7 (Wenzel). 



A common species in the eastern United States and one that 

 is easily recognizable — at least in the Atlantic region. It seems 

 rather more variable in the Mississippi Valley, and the various 

 forms of impurus which do not seem to differ from it structurally 

 may really be only still more diverse color phases of this species. 



Gl. Pachybrachys impurus Suffrian 



Of medium size, markings broad and diffuse, dark brown to 

 fuscous in the male, ferruginous in the female, front between the 

 eyes but little wider than the length of the basal antennal joint 

 in the male, ocular lines wanting; elytral striae much confused, 



TRANS. AM. ENT. SOC, XLI. 



