AMERICAN PHILOSOPHICAL SOCIETY. 581 



4. T. CINCTIOOLLIS.— Black ; posterior thoracic margin, line of 

 the elytra, and feet yellowish. 



Inhabits Indiana. 



Body black ; mouth yellowish ; palpi pale yellow : antennae 

 fuscous, three basal joints yellowish ; fourth joint piceous; tho- 

 rax, posterior margin, and lateral margin dilating towards the 

 posterior angles, honey-yellow ; seutel piceous ; elytra with an 

 appearance of striae at tip ; a sutural impressed stria, near which 

 is a series of distinct punctures, and another near the middle and 

 a submarginal one ; pale yellowish, a dilated oval blued black 

 spot extends from before the middle to the tip, does not attain 

 to the suture and is confluent with a blackish marginal line 

 which does not reach the humerus ; tergum, segments on their 

 posterior margins, obscure piceous ; feet pale yellow. 



Length less than one-fifth of an inch. 



Distinguished from the others of this country, by the differ- 

 ently colored thoracic margin. 



[Also a Boletohius. — Lec] 



5. T. IIUMIDUS. — Black ; elytra and posterior margins of the 

 abdominal segments, rufous. 



Inhabits Indiana. 



Body black; antennse brownish, base and mouth honey-yellow ; 

 thorax piceous on the posterior edge ; elytra rufous or honey- 

 yellow, an impressed subsutural line, near which is a series of 

 punctures, surface with sparse punctures almost to be traced into 

 two or three series ; sutural margin very slightly dusky ; tergum 

 blackish, with piceous posterior margins of the segments ; tip 

 somewhat fulvous ; feet honey-yellow. 



Length one-tenth of an inch. 



Allied to the preceding, but is a much smaller species, and the 

 elyti-a are immaculate. [466] 



[Erichson considers this as probably Mycetoporus Iqyidus. — 

 Leg.] 



TACHYPORUS Grav. 



1. T. FUMIPENNIS. — Black ; margin of the thorax and base 

 of the elytra yellowish. 



Inhabits Pennsylvania. 

 1834.] 



