324 GEO. H. HORN, M. D. 



Occurs everywhere in the eastern United States, extending to 

 Oregon and Vancouver. 



I. sangiiinolentus Oliv. — Piceous black, abdomen red, elytra in great 

 part red, the tip, small humeral and larger discal spot black. Length .18 — .24 

 inch; 4.5 — 6 mm. 



The sexual characters are precisely as in fasciatus. 



The elytra vary in color by the extension of the discal black 

 spot so that very little red remains, this is the variety suhromacu- 

 latus Reitter. 



Occurs from Canada to Florida and Texas. 



I. confliientus Say. — Piceous, elongate, coarsely punctured, sides of 

 thorax sinuate posteriorly. Elytra reddish testaceous, tip black, an oblique 

 humeral band, broader at tip, suture at base narrowly piceous, a small spot on 

 each side of scutellum piceous. Length .18 — .20 inch; 4.5 — 5 mm. 



Sexual characters as m fasciatus. 



The markings of this species seem to be merely a modification of 

 that of sanr/uinolenfus, in which the discal spot extends obliquely to 

 the humeri and the small spot on each side of scutellum is added. 



Occurs from Canada to Georgia. 



I. Tittatus Say. — Resembles the preceding in form, but more finely punc- 

 tured and less convex. Elytra with short linear testaceous spots. Length 

 .16 — .20 inch ; 4 — 5 mm. 



Sexual characters as in /asciatusj but with the apices of the elytra 

 % a little more prolonged. 



This species has been thought to be a variety of the preceding, but 

 it is more elongate and depressed and with finer punctuation. 



Occurs in Canada, Colorado, Utah, and extends to California, 



Oregon and Alaska. 



I. cyliiidricus Lee. — Elongate, moderately convex, piceous, sparsely 

 punctate, elytra with subhumeral spot and post-median interrupted fascia 

 red. Sides of thorax convergent posteriorly, straight. Length .26 — .30 inch; 

 6.5 — 7.5 mm. 



Sexual characters as in fasciatus. 



Occurs in California, Oregon and Nevada. 



PITYOPHAGUS Shuck. 



Labrum connate with the front, suture feebly distinct. Mandibles 

 bifid at tip. Front slightly prolonged. Prosternum not prolonged at 

 tip, anterior coxae closed behind. Antennae with an abrupt three- 

 jointed club, grooves convergent. Tarsi dilated, claws simple. Tibiae 

 finely spinous externally. (PI. Ill, fig. 27). 



The males have an additional segment scarcely more visible than 

 in Ijis. The elytra are squarely truncate in both sexes. 



