356 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



baso-sutural triangle; submarginal stria with the usual subhumeral interrup- 

 tion; markings often entirely wanting, and when present usually feeble, con- 

 sisting of traces of some of the standard spots in pale brown. Rarely the pro- 

 thoracic markings become heavy and the disk of the elytra is suffused with 

 darker brown along the suture. 



Pygidium pale, the darker basal margin and spots usually feebly defined. 

 Body beneath variable in color, the abdomen sometimes nearly uniformly 

 yellow, but more commonly with the median portions darker; sterna usually 

 of some shade of brown. Legs pale with diffuse light brown shades on the 

 thighs. 



Length 2.5 to 3.3. mm.; width 1.3 to 1.75 mm. 



Distribution. — Illinois: Quincy, June 14 (Knaus); "S. 111." (Nat. Mus. 

 Coll.-Soltau). Iowa: Eastport (Wickham Coll.). Missouri: St. Louis (Nat. 

 Mus. Coll.-Soltau). Kansas: Clark Co., 1962 ft.. May, and Douglas Co. 

 (Snow); Salina (Knaus); Rago, August; Medora (Leng Coll.); others from 

 "Ks" without definite locality. Nebraska: Nebraska City (Wickham Coll. — 

 Elliott). Dakota: (Wcnzel Coll.). Texas: Dallas (Wickham); Columbus, 

 June 21, July 28 (Hubbard & Schwarz); Austin (Casey); Camp San Saba, 

 May 27 (Knaus); Brownsville, May 1 (H. S. Barber); Galveston, May (Snow); 

 Texas (Leng Coll.); Scabrook, Aug. 5 to 7, identity doubtful (Wenzel). El 

 Paso, var.? (Fenyes). 



The type is a male from Douglas Co., Kansas. 



In common with Mr. Bowditch, I had supposed this species to 

 be the xanthias of Siiffrian until a type of the latter sent nie ])y 

 Prof. Taschenberg showed it to be an entirely different species. 



In its typical form the present species is readily separated 

 from all others, but in certain of the diverse variations which I 

 have felt compelled to include under the name there is a very 

 definite approach to both ahdominalis and peccaiis, so that the 

 disposition of sundry individuals is purely a matter of opinion. 

 The tabular characters and remarks under abdominalis will gen- 

 erally suffice for the separation of the latter from diversus. As 

 peccans is tabulated in a different part of the genus, a somewhat 

 detailed comparison may fittingly be given here. Diversus is in 

 general a rather smaller species than peccans, of a brighter yellow 

 color, the markings typically nearly wanting and rarely having 

 anything more than faint rust colored traces of the standard 

 spots; the pygidium is nearly always in great part yellow; the 

 upper surface is always finely alutaceous and scarcely or l)ut 

 feebly shining; the eyes are less distant, being separated in the 

 male by evidently less than twice the length of the basal an- 

 tennal joint. In peccans the color is typically and generally of 



