H. C. FALL 413 



95. Pachybrachys atomarius Mtlsheimer 



Fuscous, speckled with few to many small yellow spots, lustre 

 dull, punctuation dense, elytral striae defined only toward the 

 rear and sides, pyoidium entirely l)lack; eyes rather distant, 

 ocular lines wanting, front claws of male not appreciably enlarged. 

 Ave. length 2.6 mm. Eastern United States. 



Head not wider than the pi'othoracic apex, in llie tyjjical form predominant I}' 

 yellow and spansely punctured in the male; th<> fuscous s])ots more extended, 

 the dark areas usually predominating, the punctuation closer in the female. 

 Eyes (cf ) separated bj^ twice the length of the basal antemial joint or slightly 

 less, and by about two and three-fourths times the length of the basal joint in 

 the female. Antennae not esjiecially slender, about three-fourths as long as 

 the body in the male, yellow, becoming blackish toward the tip, the basal 

 two or three joints more or less blackish above as usual, tenth joint about two 

 and one-half or two and three-fourths times as long as wide. 



Prothornx moderately narrowed in front, sides broadly arcuate, a little more 

 strongl}' so behind the middle, surface densely punctate to the extreme margins. 



Elytra densely confusedlj' punctate over a large part of the disk, with frag- 

 ments of striae on the convexity and toward the sides, especially posteriorly; 

 eighth stria and sometimes the seventh fairly well defined throughout ; mar- 

 ginal interspace punctate throughout; shield small, con^-ex, yellow, and usually 

 fairly conspicuous. 



Pygidiuin and bodj' beneath entirelj' black. Legs black and yellow, the 

 colors variable in extent, hind tibiae entirely black, or at most suffusedly yel- 

 lowish for a short distance at base. 



Length 2.2 to 3 mm.; width 1.15 to 1.7 nun. 



Distribution. ~Xew York: Staten Island (Leng); ^^■est Hebron, .June 20 

 (Leng); ]\It. Vernon (Sherman); X. Y. (Xat. Mus. Coll.). Xeir Jersey: 

 Snake Hill (Liebeck). Pennsylvania: Pocono Lake, July 28 (Wenzelj; "Pa." 

 (Melsheimer Coll.). West Virginia: White Sulphur Sjirings, July (Fenyes). 

 N'ortb Carolina: (Leng Coll.). Alabama: Mol)il(> and vicinity, April and May 

 (Lodiiig); Wadley (Sohau— Xat. Mus. Coll.). Florida: Key West (Leng). 

 Kentucky: (Soltau — X'at. Mus. Coll.). Ohio: Cincinnati (Dury); Ohio (Hub- 

 bard & Schwarz). Michigan: Detroit (Hubbard A: Schwarz). Indiana: 

 Indianapolis, July 14. Illinois: "X'. 111."; Bloomington, Jime S (Wickham). 

 Iowa: Iowa City, May 19 to 23, Tiffin, June 5; Chariton (all in Wickham Coll.). 

 Arkansas: Little Rock (^^'ickham). Missouri: St. Louis (Knaus); Sahna 

 (Knaus); "Mo" (Xat. Mus.). Kansas: McPherson (Knaus); Douglas Co. 

 (Snow); "Kan" (X'at. Mus.). Xehraska: Lincoln (\\'ickham); "Xeb." (Snow). 

 Manitoba: Winnipeg (Wickham Coll.). 



As indicated in the diagnosis, this s])ecies varies greatly in its 

 mottling. At one extreme the black or fuscous surface is only 

 relieved by a few small scattered yellow flecks, which may rarely 

 be entirel>' lacking on the head and i)rothorax; at the other 



TRANS. A.M. i;.\T. SOC, XLI. 



