230 MEMOIRS ON THE COLEOPTERA 



elytra equal in width to the prothorax, three-fourths longer than wide, 

 subinflated and wider behind the middle than at base; lateral series 

 widely interrupted, the subapical sinus moderately deep; striaa rather 

 deeply impressed though fine, not very coarsely punctate, the intervals 

 feebly convex except laterally, strongly convex on the apical declivity. 

 Length (cf) 12.0 mm.; width 4.5 mm. A single example, probably 

 taken in Colorado by Levette. 



This distinct species belongs to the laticollis section, but differs 

 greatly in its narrower and more parallel form, much less transverse 

 prothorax and in many other characters. From spadiceus it differs 

 in the shorter and more abruptly formed basal sinus of the thoracic 

 sides, relatively longer and less transverse prothorax, which is also 

 less reflexed at the sides, in its still longer male antennae and in the 

 still broader anterior male tarsi. 



Curtonotus catenulatus n. sp. Oblong, parallel, only moderately con- 

 vex, deep black and polished, with the elytra bluish-black; under surface 

 black, with the legs pale ferruginous; head fully three-fifths as wide as the 

 prothorax, the eyes prominent, the strioles fine, parallel; antennae pale 

 ferruginous, long, almost equaling the head and prothorax. the latter 

 one-half wider than long, the sinuate apex with broadly obtuse angles 

 and not quite as wide as the base; sides broadly and evenly rounded 

 almost to the base, becoming very briefly sinuate at the angles, which 

 are slightly acute and very sharp; margins abruptly and strongly re- 

 flexed, feebly punctulate; surface with a few fine scattered punctures 

 apically, the basal fovese large, deep, feebly divided and with moderate 

 punctures extending entirely across as usual; median stria subentire, 

 the carinae strong and rather narrow; elytra equal in width to the pro- 

 thorax, three-fifths longer than wide, parallel, with feebly arcuate sides; 

 striae rather fine but deep, with the punctures relatively coarse and much 

 wider than the striae, distinct to the apical declivity; lateral series moder- 

 ately interrupted, the subapical sinus rather broad and shallow; inter- 

 vals nearly flat except at apex. Length (ij 1 ) 10.3 mm.; width 3.8 mm. 

 Montana (Billings), Shantz. 



This species is evidently allied to infaustus Lee., but has the 

 elytra blue-black, with a very long scutellar stria said to be moder- 

 ate in infaustus by Hayward; the two basal joints of the hind tarsi 

 have each a very faint external stria, only traceable toward base. 

 There are some coarse punctures at the sides of the metasternum 

 and on the met-episterna ; the latero-basal parts of the abdomen are 

 finely punctate. The transverse thoracic impressions are said by 

 Mr. Hayward to be obsolete in infaustus, they are very evident in 

 the present species. 



The two following species received from Mr. Sherman a few years 



