360 



PUPAE 



1. Dorsal abdominal segments, except first, armed with an irregular 



transverse series, or 2 such series, of very stout thorns, their bases 

 very much dilated, slightly caudad of which series there are some- 

 times a few widely separated, much longer spines 2 



— Dorsal abdominal segments, 4 to 6 at least, with 1 or 2 transverse 



series of short irregular spines the bases of which are not much 

 dilated, and slightly caudad of these is a transverse series of 

 closely placed, very long, slender bristles 4 



2. Seventh dorsal abdominal segment with 10—12 moderately long 



thorns in a continuous transverse series, slightly cephalad of which 

 is a transverse series of very short stout thorns longitudinally in 

 line with the spaces between the thorns of the posterior series. . . . 

 carolinensis Macquart. 



— Seventh dorsal abdominal segment with the posterior transverse 



series consisting of 2 long, widely separated spines on middle por- 

 tion, and several, closely placed, on each lateral extremity which 

 are but little caudad of the much shorter thorns of the anterior 

 series 3 



3. The portion of head-capsule between bases of antennae distinctly 



elevated, flattened, strongly rugose, the lower extremity of the ele- 

 vation strongly carinate and with a central incision; abdominal 

 armature very strong, having much the appearance dorsally of a 



single irregular transverse series on each segment 



lasiophtlialmus Macquart. 



— The portion of head-capsule between bases of antennae slightly ele- 



vated, rounded, faintly rugose, and not carinate or divided below ; 

 abdominal armature moderately strong, distinctly biserial lat- 

 erally epistates Osten Sacken. 



4. Small species, 20 mm. or less in length ; abdominal spiracles with 



C-shaped rima 5 



— Larger species, at least 25 mm. in length ; abdominal spiracles with 



very much elongated vertical rima, the upper and lower extrem- 

 ities slightly curved forward 6 



5. Bristles on eighth ventral abdominal segment fused basally, giving 



them the appearance of an elevated ridge with a serrate edge. . . . 

 lineola Fabricius. 



— Bristles on eighth ventral abdominal segment not fused basally. . . . 



costalis Wiedemann. 



6. The long spines on dorsal abdominal segments with a ring beyond 



middle and their apices black ; short spines on median portion of 

 each anterior transverse dorsal series stout and almost uniform 

 in length atratus Fabricius. 



— The long spines on dorsal abdominal segments either black-tipped 



or all pale, without a black preapieal ring; short spines in ante- 

 rior dorsal series slender and very uneven 7 



