370 ACADEMY OF NATURAL SCIENCES 



posterior limb extending along tlie costal margin, to tte tip or a 

 little below ; a brown point on the costal margin within the V ; 

 near the base a brown hand parallel to the basal limb of the V : 

 poisers pale yellow : abdomen pale yellow, ultimate segment with 

 a black dot each side : pleura with a yellow line each side. 

 Length three-tenths of an inch. 



2. T. OBLIQUA. — Yellowish: wings with oblique bands j ter- 

 gum with two series of black dots. 



' Inhabits Indiana. 



Body pale brownish-yellow : wings with a definite yellowish 

 costal margin, and three very oblique bands proceeding from the 

 costal margin ; basal band terminating on the thin margin mid- 

 way between the anal and axillary nervures : middle band termi- 

 nating at the tip of the anal nervure ; outer baud terminating at 

 tip of the interno-medial nervure ; costal margin ending a little 

 beyond the externo-medial nervure ; the bands are edged ex- 

 teriorly with a black line, which is dilated into a spot at tip : 

 thorax with two black dots behind : scutel yellow, pale : tei-gum 

 with a series of black dots each side. 



Length one-tenth of an inch. 



The wing bands are parallel and equidistant, the intervals are 

 as broad as the bands. [ 187] 



3. T. CALIPTERA. — Wings black, with hyaline points, apical 

 edge white. 



Inhabits Indiana. 



Body dull brownish, or dirty honey-yellow : hypostoma with 

 two deep black dots : wings rounded, black, with very numerous, 

 subequal, hyaline points, those of the thinner margin rather 

 larger ; apical margin white : poisers yellow at tip : tarsi paler 

 than the leg. 



Length more than one-fifth of an inch. 



CHLOKOPS Meig. 



'€. PROXIMUS. — Yellow; thorax trilineate with black. 



Inhabits Indiana. 



Body yellow : antennce black : vertex with a black triangle 

 •elongated before almost to the base of the antennee : occiput 

 with a large black spot, like a dilated continuation of the tri- 

 angle of the vertex: thorax with three black vittae: scutel im- 



[Vol. VI. 



