OP PHILADELPHIA. 369 



darker than the thorax : wings with a brown fascia rather before 

 the middle, hardly to be traced to the thinner margin, and not 

 passing over the middle cross nervure ; another band passing- 

 over the other cross nervure, and nearly parallel to the first : tip 

 brown, as broad as the other bands, and connected to the second 

 band by the costal margin : feet honey-yellow ; thighs dusky at 

 base : abdomen greenish, towards the tip tinged with cupreous. 



Length one-fifth of an inch. 



4. 0. VAU. — Blackish ; wings with about three bands and tip 

 fuscous. [185] 



Inhabits Ohio. 



Body dark cinereous, with numerous fuscous points and spots : 

 antennae, terminal joint piceous : superior orbits and band above 

 the antennae piceous : vertex and front blackish : poisers whitish : 

 wings hyaline, near the base a fuscous band much paler in the 

 middle ; another somewhat dislocated band passes over the two 

 cross nervures, the inferior or dislocated portion points to a cos- 

 tal spot beyond the middle, and if continued to it would form 

 the letter V ; this band is also much paler in the middle ; tip 

 fuscous. 



Length more than one-fifth of an inch. 



The circumstance of the wing bands being paler in the middle, 

 gives the costal margin the appearance of having four equal, 

 equidistant .spots. 



The inferior dislocated portion of the second band, is some- 

 times so extended as almost to join the third costal spot. 



When recent, the eyes are sanguineous, with a longitudinal, 

 pale, narrow line. 



It occurred in plenty early in August. 



TRYPETA Meig. 



1. T. ELECTA. — Thorax lineate with bright yellow; wings fas- 

 ciated. 



Inhabits Indiana. 



Head pale yellowish : thorax honey-yellow ; a line before the 

 wings bright yellow, another over the [186] wings confluent be- 

 hind with the bright yellow scutal, and another on the middle 

 abbreviated before : wings hyaline, a brown V on the middle, the 

 1830.] 24 



