4S0 



NEW YORK STATE MUSEUM 



Explanation of Plate IV. 



Fig. 1. — Natural position of Bittacus strigosus . Drawn from a photograph 

 of the living insect (enlarged). 



Fig. 2. — Fore tarsus of B. strigosus: a, 4th and 5th segments apposed; 



b, teeth of 5th enlarged; c, do. of 4th; d, armature of 3d on mid- 

 dle legs; e, the same of 2d and 3d segments of hind legs. 



Fig. 3. — Fore leg of Panorpa rufescens. 



Fig. 4. — Lateral aspect of the head of P. rufescens. 



Fig . 5 . — Front of same . 



Fig. 6. — Portions of the fourth and fifth abdominal segments of P. rufescens, 



showing the dorsal abdominal organ of the male. 

 Fig. 7.— Terminal antennal segment of B. strigosus. 

 Fig. 8. — Three antennal segments, 8th, 9th and 10th, of P. rufescens. 

 Fig. 9.— Egg of B. strigosus. 

 Fig. 10. — Egg of P. rufescens. 

 Fig. 11. — A single ovarian tube of P. rufescens. 

 Fig. 12. — Lateral aspect of male abdomen of P. rufescens. 



Figures 4, 5, 9, 10, 12 were drawn by aid of the camera lucida; the others, 

 to scale. Figures 2, 3, 6, 7, 8, 9, 10, 11 greatly enlarged; figures 4, 5, 12 

 moderately enlarged . 



