580 TRANSACTIONS OF THE 



TACHINUS Grav. 



1. T. ATRICAUDATUS nob. — Very closely allied to atricapillus, 

 and cinctus G-rav. 



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 strias; 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 BoJetobms. — Lec] 



3. T. TRIMACULATUS. — Yellowi.sh ; head and three elytral 

 spots blackish ; tergum rufous. 



Inhabits Pennsylvania. 



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

 antenna) fuscous; four basal joints pale yellow; mouth yellow; 

 mandibles piceous at tip ; thorax immaculate ; scutcl piceous ; 

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

 the tip obsolete impressed strije, 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 jiarrow and paler sutural 

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

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

 notreaching 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 Bokto- 

 hius pi/gmxm ; it has been subsequently described as 5. it?i?£S- 

 tus, Mels., and B. aurjularh, Saehse, Ent. Zeit. 1852, 122.— 

 Lec] 



[Vol. IV. 



