Coleopterous Insects of Massachusetts. 39 
black: thorax sub-quadrate, rather broader than long, 
sides somewhat depressed and curving, apparently with 
five vitte, three of them, viz. the middle and marginal 
ones, composed of short yellowish hairs, and the other 
two purplish, owing to the spaces which they occupy 
being denuded: elytra rather finely rugose, sides sub- 
parallel, a little depressed above the middle; apices 
rather obtusely rounded: pectus purplish: abdomen 
black or purplish black, with a marginal vitta of yellow- 
ish hairs presenting a somewhat metallic appearance. 
Length from a little over three tenths to nearly four 
tenths of an inch. 
Both sexes occurred July, 1833, in Cambridge, Mass. 
10. TACHINUS GEMINATUS. 
T. corpore levi, brevissimo, nigro; antennis nigris; thorace trans- 
versé quadrato, testaceo marginato; elytris testaceis; margine supra 
medium et macula magná elongata centrali, nigris; pedibus testaceis. 
Body smooth, black, very short: antenne black: 
thorax transversely quadrate, margined laterally with 
testaceous: elyfra testaceous except the sides superiorly, 
and a large spot on the middle of each, which are black ; 
bristles towards the apex rather numerous and stout: 
Jeet testaceous. 
Length from one tenth to little more than one teni 
of an inch. 
"This species varies somewhat in color in different spe- 
cimens. Sometimes the black spot of the elytra occu- 
pies nearly the whole surface, and sometimes the sides of 
the elytra are wholly testaceous. 
Occurred abundantly about manure, Sept. 1834, at 
Brookline, Mass. 
