332 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



surface polished, densely rather finely punctate, the median line narrowly 

 smooth or sparsely punctate; disk sometimes entirely black, more commonly 

 with two basal spots and a narrow apical median vitta yellow. 



Elytra slightly longer than wide, sides parallel, punctuation dense and more 

 or less rugose, coarser punctures in part serially arranged, one or two lateral 

 and two discal intervals usually feebly costiform; finer interstitial punctures 

 numerous, most evident toward the elylral apex. 



Beneath black, apical part of last ventral segment pale; legs bicolored; front 

 claws of cf scarcely larger. 



Length 3 to 4.5 mm., width 1.7 to 2.4 mm. 



Distrihuiion. — California: San Diego, May; Arrowhead Springs, May 31; 

 Mokelumne Hill (Blaisdell); Sobre Vista, Sonoma Co., July, Shasta Co., and 

 Marin Co. (Van Dyke); Mt. Breckenridge, Kern Co., June 6, (F. Grinnell). 

 Man}^ specimens, including the LeConte type, are labeled simply "Cal." 

 Nevada: Reno (Wickham); Las Vegas (Spaulding). Utah: American Fork, 

 June 24, (Hubbard & Schwarz). Arizona: Catalina Springs (Hubbard & 

 Schwarz); not quite typical and doubtfully referred. Lower California: 

 Ensenada (Beyer). 



A rather widely dispersed species in the Southwest, and showing 

 a good deal of variability in the extent of the pale markings. 

 The prevailing color is nearly always black, but a few specimens 

 have the elytra in great part testaceous and less densely and 

 roughly punctured; these bear a strong resemblance to viarmora- 

 tus Jac, in which, however, the prothorax is more conical in form. 

 In what I take to be the typical form the prothorax is almost 

 devoid of fine interstitial pimctuation, but in other examples 

 these are quite evident, and intermediates are not wanting. 

 There is also noticeable some variation in the width of the front 

 between the eyes. 



9. Pachybrachys desertus new species 



Very similar in size, form, sculpture and pubescence to analis; 

 color entirely rufo-testaceous, the body beneath blackish in some 

 males. 



Head with the standard spots brown or fuscous, upper surface with faint 

 rufous or livid clouds representing the prothoracic M, and occasionally with 

 faint diffuse traces of one or more of the standard elytral spots. 



Prothorax not very strongly narrowed toward the front, the sides as a rule 

 more evenly rounded than in analis, the punctuation always intermixed, the 

 finer punctures less fine than in those specimens of analis in which they occm*; 

 legs rufo-testaceous. 



Length 3 to 4.5 mm. 



Distribution. — California: Mojave (Wickham), June 1 (Fenyes), type cf ; 

 Old Beach, Colorado Desert, April; San Tiernardino Co., San Diego Co. (Co- 



