580 TKANSACTIONS OF THE 



TACHINUS Gray. 



1. T. ATRICAUDATUS nob. — Very closely allied to rt^r?cap<7^«s, 

 and cinctus Grav. 



2. T. OBSOLETUS. — Black; thorax, curve on the elytra, seg- 

 ment margins and feet yellowish. 



Inhabits Virginia. 



Body black; antennae fuscous; four basal joints yellowish; 

 tip of the last joint dirty fulvous; mouth honey-yellow; thorax 

 honey-yellow ; elytra, in some lights with an appearance of obso- 

 lete striae; subsutural impressed line obvious; a honey -yellow 

 base, suture and terminal margin ; abdomen with the segments 

 piceous on their posterior margins; feet pale yellowish. 

 Length over one-fourth of an inch. 



I obtained this species in October, at Chinquoteague Island. 

 [Belongs to Boletohhis. — Leg.] 



3. T. TRIMACULATUS. — Yellowish ; head and three elytral 

 spots blackish ; tergum rufous. 

 Inhabits Pennsylvania. 



Body yellow, tinged with honey-yellow ; head obscure piceous; 

 antennae fuscous ; four basal joints pale yellow; mouth yellow; 

 mandibles piceous at tip ; thorax immaculate ; scutel piceous ; 

 elytra with a few remote punctures on the basal half, and towards 

 the tip obsolete impressed striae, a subsutural impressed line, near 

 which is a series of distant larger punctures ; region of the scutel 

 with a dilated blackish triangle, extending to the middle of the 

 length of the suture, and thence by a narrow and paler sutural 

 line to the tip; exterior [465] margin or epipleura black, with 

 a spot near its tip extending inwards, half way to the suture, but 

 not reaching the tip of the elytra ; tergum dull sanguineous; near 

 the tip with an obsolete, blackish band ; at tip with a yellowish 

 tinge. 



Length over three-twentieths of an inch. 



[Considered by Erichson identical with the European Bohto- 

 bius pygmseus ; it has been subsequently described as B. venus- 

 tus, Mels., and B, angnhiris, 8achse, Ent. Zeit. 1852, 122. — 

 Leg,] 



[Vol. IV. 



