OF PIlILADEriPIlIA. 393 



brown lines ; abdomen brown, with a yellow vitta; dilated at tip^ 



Inhabits the United States. 



Length less than two inches. 



% Head greenish-yellow ; eyes distant above ; labruiu with an 

 indented point in the middle ; between the eyes a black baud, 

 including the stemmata and antenna!; thorax greenish-yel- 

 low, with three double fuscous vitta); between the wings a 

 greenish-yellow vittas ; wings immaculate ; costal nervure green- 

 ish ; carpus fuscous small, the transverse line of its base pa.ss- 

 ing obli({uely across the second series of cellules ; acces.^ttry 

 membrane very small ; abdomen dark fu.scous, cylindrical, thicker 

 at base, and aiuch dilated at tip; a dorsal yellowish line, inter- 

 rupted by the incisures, wider on the basal segment, and ex- 

 hibiting a spot only on two of the dilated segments; anal ap- 

 pendices four, short, subulate : sides of the abdomen with a di- 

 lated [17] yellowish vitta on the basal segment, on which is also 

 a lateral tubercle ; remaining segments with a spot on the base 

 of each, those on the dilated segments are much larger, that on 

 the terminal segment occupying all the side, yellow and conspi- 

 cuous ; pleura green-yellow, with two oblicjne, fuscous lines ; foet 

 fuscous : tibia with a dull green line ; the dilated tip of the ab- 

 domen is very concave beneath. 



9 Tubercles of the basal segment of the abdomen obsolete ; 

 abdomen at tip .somewhat less dilated ; anal appendices two. 



Length two inches. 



Common in June, on the banks of the "Wabash. 



It rcacmhlca /ore ijxttn Fabr., closely, but the feet of that spe- 

 cies are yellowish above ; the dorsal line of the abdomen is capi- 

 tate on each segment, and on the basal segment trilobate. 



It belongs to the genus fjunij>hus Leach. 



10. ^.STIGMATA. — 9 Body yellow ; stemmata rather large; 

 thorax with r double brown arcuated vitta before, each side of 

 whicn is an abbreviated, oblique, brown line, and another brown 

 line on the suture of the pleura ; wings with a very slight tinge 

 of yellowish, at their origin ferruginous ; costal edge whitish, 

 with two series of minute black points ; stigma rather large, 

 blackish ; tergum, each segment excepting the basal and ultimate 



1839.] 



