2*J6 Illinois State Lohoratory of Natural History. 



Surface whitish, dull pubescent markings very light 

 brown but distinct, annuli narrow, crests of false feet 

 also dull pubescent, their sides striate; lateral stripes- 

 of thorax distinct, slender, not dilated posteriorly, lateral 

 edges of dorsal areas of thorax diverging. An 

 opaque dark ring about base of respiratory tube, and 

 another encircling anal prominence, above it usually 

 three light brown spots. 



Main internal tracheae rather thick and noticeable, 

 subparallel, not strongly sinuate, at least back of the 

 middle. Terminal stigmatal spine often protruded. 



Pupa [Fig. 43-46].— Length 19 mm., diameter 3 mm. 

 Light ferruginous brown, shining, abdomen roughly 

 wrinkled and subopaque. Palpal sheaths indistinct, not 

 distant; tubercles not dark; ocellar tubercles indistinct 

 or wanting; thoracic spiracular tubercles [Fig. 45} 

 slightly but nearly equally elevated, free margin 

 rounded at tip, rima not vertical, evenly arcuate, slightly 

 hooked in front. 



Abdominal spiracular tubercles subtriangular, nar- 

 rower behind, obliquely subconical. much shorter than- 

 basal diameter, bearing a small subcircular or short 

 and strongly arcuate rima [Fig 44] ; on anterior slope 

 a transverse groove, usually longer than the rima; 

 fringes formed of unequal pale spines, only one or two 

 long spines above on seventh segment; outer terminal 

 teeth much longer than the others, directed laterally and 

 upwards, the tips of the four upper teeth about in line 

 [Fig. 46]. Fringe anterior to anal prominence showing 

 a chitinous webbing between the bases of the spiups^ 

 so that the separated tufts of the female look like a pair 

 of broad low teeth with several spiny points; lateral tufts 

 low down, near ends of ventral fringe, formed of short 

 spines. 



T. costalis Wied. 



This seems to be normally a terrestrial larva. We- 

 have taken it two or three times in the earth of corn. 



