THE CANADIAN ENTOMOLOGIST. 28? 



tendency at the base ; apex in both sexes smooth, except for marginal 

 stria, which is barely sinuate behind the lobe, the latter is well developed, 

 especially in the $ , and almost without punctures ; below pallid with 

 sericeous pubescence ; legs pale, $ fossa deep and well marked. 



Two J's, 3 $ 's, Prescott, Arizona; 4 ? 's, Douglas Co., Kansas. 

 Type coll., Bowditch. 



Very similar 'to puuctatus, nov. sp., but the general form is more 

 elongate parallel and not as stout ; the antennae are not so dark, nor do 

 any of my specimens show- a black sutural margin, as is the case in 

 punctatus ; the £ 's in Arizonensis show these features best and are more 

 pallid. 



Pachybrachys Balsas, n. sp. — Body above and legs bright yellow, 

 below, except the thorax, black. Length, 2^-3^ mm. 



Head finely punctured with frontal dark mark, eyes of <£ approxi- 

 mated, more than $? , antennae of $ reaching nearly the middle of 

 abdomen, of $ to hind coxa, yellow for five or six joints, then becoming 

 darker ; thorax somewhat narrowed in front, finely and diffusely punctate, 

 with deep depression in rear, and a slightly depressed and discoloured 

 spot on either side, there being a similar discolouration touching the 

 depression before the scutel ; elytra with the first stria consisting of 

 twelve or fifteen fine punctures irregular, also two or three of the striae 

 behind the humerus slightly irregular, all of the others regular; unicolourous, 

 so that the general appearance of the species at first sight is yellow, 

 regularly striate ; none of my specimens have any cloud of colour ; 

 marginal stria straight after passing the humeral curve, lobe small, 

 gradually narrowed behind, with a small row of well-marked marginal 

 punctures on the curve ; legs yellow, with whitish clouds on the thighs, 

 head and thorax below and epimera are yellow or rufous, the remainder 

 of the body is plain dull black, covered with scanty, whitish pubescence. 



Rio Balsas Guerrero, Mexico, two £ 's, three ? 's, Wickham 

 collector. Type coll., Bowditch. 



The bright yellow upper and black under side readily identify this 

 form. It would, by form and sculpture, be placed near Xanthias, Suff. 



Pachybrachys Peckii, nov. sp. — Small, size of conformis, Dej , or 

 minutus, Jar. General colour yellow, with three dark longitudinal stripes 

 on the prothorax and fairly regular stria of black punctures on elytra. 

 Length, 1^-2^ mm. 



Head yellow, flat, finely punctured, sparsely on the yellow portions, 

 with an uncommonly wide dark frontal mark, forked in front and connected 



