364 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



medially on each elytron; eighth stria more or less interrupted behind the 

 humerus, marginal interspace with a few coarse punctures (rarely lacking) 

 subbasally; shield small, usually indistinct; standard spots not large, usually 

 distinct except the basal one of the inner series which is rarely if ever present. 



Pygidium mostly yellow, basal margin brown. Body beneath brown or 

 blackish with dull yellow abdominal margins more or less developed. Legs 

 yellow with small dark femoral spots. 



Length 2.25 to 2.7 mm.; width 1.15 to 1.45 mm. 



Distribution. — New Ham-psJiire: (BlanchardColl.). Massachusetts: Lowell; 

 Tyngsboro; Wakefield; Wellfleet (Colls. Blanchard, Wickham, and my own). 

 Rhode Island: Berkeley, Aug. 27. New York: Staten Island, July (Leng). 

 New Jersey: Anglesea, July 23 (Hubbard & Schwarz) ; Greenwood Lake (Leng) ; 

 "N. J." (Liebeck). Pennsylvania: (Liebeck). Maryland: Plummer's Island, 

 June and July (Schwarz & Barber). Virginia: without definite locality. 

 Georgia: Clayton (Leng). Alabama: Pineapple (Hubbard ct Schwarz). 

 Michigan: Detroit (Hubbard & Schwarz). Illinois: Algonquin (Nason). 

 Iowa: Elma, June 30 (Snow Coll.). 



This is a well characterized species and not confusable with 

 any other except sobrinus, which it greatly reseml^les. The 

 sinuation of the anterior tibia is unique and apparently inde- 

 pendent of sex, and though rather small and shallow is sufficiently 

 obvious when the tibia is in a proper position for observation. 



My interpretation of this species is based on undou]:)tedly 

 authentic specimens in the old Melsheimer and Ziegier Collec- 

 tions. 



47. Pachybrachys sobrinus Haldeman 



Almost precisely like pectoralis in general appearance and differing only as 

 follows. Ej^es not quite so approximate, distant in the male by the length of 

 the basal antennal joint and in the female by about the length of the first two 

 joints of the antennae; front tibiae not sinuate on the inner margin. Taking 

 the material at hand as a whole, the elytral striae are apt to be less deep in 

 sobrinus, the maculation more variable both in extent and depth of color, the 

 two posterior spots more often confluent. The size is also distinctly greater 

 on the average in sobrinus. 



Length 2.6 to 3.25 mm.; width 1.25 to 1.65 mm. 



Distribution. — Equally as widely dispersed as pectorolis and 

 over nearly the same area, but pectoralis is the more common of 

 the two in the northern or at least in the northeastern part of its 

 range, while sobrinus is more abundant toward the south. It 

 was described from the "Southern States." 



I have seen specimens from the following localities: 



