50 ACADEMY OF NATUBAL SCIENCES 



Length two-fifths of an inch. 



6. T. TRiviTTATA. — Wings four-banded with fuscous ; tergum 

 yellow with a dorsal and lateral fuscous vitta. 



Inhabits Pennsylvania. 



Head dusky ; front, rostrum, and base of the antennae pale ; 

 thorax whitish-cinereous, lineate with light brown, the lines 

 double ; collar with a brown line, and lateral dusky spot ; scut^l 

 and metathorax with a brown line ; pleura and pectus gray ; 

 poisers whitish, capitulum brown ; wings with fuscous margined 

 nervures, fuscous bands and white areolae, between the first and 

 •eeond band is a semi-band on the thinner margin, second band 

 enclosing a white spot on the costal margin ; feet dusky ; tergum 

 with a longitudinal fuscous line, segments with lateral fuscous 

 triangles and a dorsal transverse abbreviated dorsal line near the 

 middle of each. 



Length one inch. 



Nervures resembling those of the preceding species. 



SCIOPHILA HoflF. 



S. FASCIATA. — Pale-yellowish ; thorax trilineat^ ; tergum fas- 

 (riate with fuscous. [27] 



Inhabits Pennsylvania and Maryland. 



Antennae at tip, and vertex fuscous ; thorax with a double 

 light-brown middle line attenuated and abbreviated behind, a 

 dark chestnut dilated line on each side abbreviated before, and a 

 small obsolete one above the origin of the wings; pleura with a 

 dusky spot over the insertion of each foot, placed triangularly, 

 the inferior one itself triangular ; tibise and tarsi a little dusky ; 

 segments of the tergum fuscous on their posterior margins. 



Length rather more than one-fifth of an inch. 



RYPHUS Latr. iMeig. 

 1. Pi. MARGINATUS. — Wings spotted; thorax trilineate with 

 rufous. 



Inhabits Pennsylvania. 



Head dull reddish-brown ; vertex blackish ; thorax cinereous, 

 with three rufous lines, of which the middle one is abbreviated || 

 V>ehind, and the lateral ones are abbreviated before; wings with ' 



[Vol. JII. 



