H. C. FALL 391 



Length 3.3 to 4.25 mm.; width 1.75 to 2.3 mm. 



Distribulion. — Arizona: Prescott (type); Ash Fork, Juni- 18 (Barber & 

 Schwarz); Williams, July 18 (Barber & Schwarz). Utah: American Fork 

 Caiion, June 23 (Hubbard & Schwarz); Chad's Ranch (var? in Bowditch Coll.). 

 Nevada: Esmerakla, June 27 (Xunenmacher). Calif ornia: Los Angeles Co., 

 May (Am. Ent. Soc. Coll.). 



75. Pachybrachus notatus Bowditch 



Original description. "Large .sized, stout, dull black and bright yellow, 

 thorax with three prominent yellow spots on top, elytra ftiirly regularly striate 

 punctate. Length 3^ mm." 



"Head j'ellow, flat, with black vertex, connected with center line, wliich 

 runs into a crescent mark which ends at the antennae on either side, black 

 marks thickly punctate, clypeal edge also black, sparingly whitish pubescent, 

 especially in the angles of the eyes, which are distant; antennae dark, lighter 

 toward the base, reaching the hmd coxa in cT ; thorax constricted in front and 

 narrowed behind, yellow, with very narrow beading on front margin black, the 

 surface covered bj^ a broad black j\I, which occupies nearly the whole rear 

 margin and leaves a lateral and anterior border of yellow, the former being 

 the widest; there is also a pear shaped 3'ellow spot placed obhquelj' and pointing 

 to the scutel on either side of the disk at the rear, dilated end to the front and 

 an anterior median spot, which joins the yellow^ margin, also a small yellow 

 dot on each side; surface with sparse punctures, closer toward the anterior 

 corners, the yellow margins, except as aforesaid, are about free from punctures, 

 lateral edge very slightly subangulate in d' ; elytra parallel, slightly compressed 

 behind the shoulders, yellow, with suture and margin narrowly black; the inside 

 standard spots suffused longitudinally into an irregular black mark joining a 

 transverse band on the convexity formed by the suffusion of the four rear 

 spots, the external middle spot is not suffused, the humeral spot is also distinct, 

 the punctuation is a little coarser than the thorax, largety confused, but the 

 intervals from the third outwards on the the rear half of the elytra are more or 

 less distinctly indicated, though the costae are everywhere flat, the third and 

 fourth and the marginal and next to it are the most marked intervals, there is 

 also a prominent smooth yellow sutural shield and another patch occupying 

 three or four intervals and forming a transverse spot on the side just before the 

 convexity; marginal stria barely sinuate behind the lobe, w^hich is wide and 

 smooth, with a fine row of marginal punctures; under side black, with silveiy 

 pubescence, prosternum semisulcate; legs yellow, with spots on thighs, and 

 tibiae and tarsi darker; hind thighs with a white spot on end, and front thighs 

 with light spot on front." 



"One d^ Santa Rita Mts., Arizona. Collected by the late Professor Snow. 

 In form, size and general appearance very similar to inclusus Jac. Type in 

 Snow collections." 



I have not seen the unique type of this species, and as the above 

 description does not touch upon the characters most needful for 



TRANS. AM. ENT. SOC, XLI. 



