344 DATEXPORT ACADEMY OF NATURAL SCIENCES. 



hatching ; a, conical projection on the head, — " egg-opener"" ; e, eye spot ; 

 at, antennsE ; m and max, [supposed at the time of etching the plate to 

 represent the mandibles and maxillre, probably imaginary] ; ?>s, buccal 

 setie ooiled up spirally ; I, II, III first, second, and third legs. 100 di- 

 ameters. See pages 298-300. 



Fig. 24. Abnormally formed egg. 50 diameters. Page 300. 



Fig. 25. Larva soon afterbirth, from above. I-IX, first to ninth ab- 

 dominal segments : a?i, conical bases of the anal setse ; ov, leaf-like organs 

 on the ninth segment, each composed of three spines cemented together. 

 [An attempt to show some of the internal organs and external surface at 

 the same time, has rendered this figure somewhat confused in appear- 

 ance.] 75 diameters. See page :^00. 



Fig. 25 a. Leg of larva ; co, portion nf integument to which leg is at- 

 tached [which I took for the coxa at the time of etching] ; tr, coxa ; y, 

 trochanter ; /, femur ; ti, tibia ; ts, tarsus. 200 diameters. Page 303. 



Fig. 25 b. Antenna of larva ; l-T, the different joints. 200 diameters. 

 Page 302. 



Figs. 25c, 25d, 2oe, showing the ninth abdominal segment in different 

 positions; 25e, ventral, the rest dorsal. 75 diameters. Page oO-l. 



Fig. 26. Larva after the first moult, from below ; og, supraoesopha- 

 geal ganglion ; spr., spiracles ; v, ventriculus (ansa minor) ; ov, vulvular 

 spines (on ninth segment) ; an, anal valves, seen through enlargement of 

 the end of the anal fissure. 50 diameters. Page 306. 



Fig. 26a. Mouth parts and chitinous frame work supporting them. 

 See page 317 for full description, also page 302. 



Plate XIII. 



Fig. 27. Pupa of male under its scale seen from above ; a, waxen 

 scalB covering the pupa; b, integument of the larva; c, integument of 

 the pupa formed within that of the larva. 25 diameters. Page 307. 



Fig. 28. The pupa a little more advanced, taken out of its scale, seen 

 from below. 25 diameters. Page 307. 



Fig. 29. A pupa, a, from which a thin transparent pellicle, b. has 

 been slipped partly off ; from above. 25 diameters. Page 307. 



Fig. 30. A still more advanced pupa, from below. 25 diameters. 

 Page 307. 



Fig. 31. A fully developed male, from below. 25 diameters. Page 308. 



Fig. 32. Female at time of appearance of males, from above. 25 di- 

 ameters. Page 314. 



Fig. 32a. Antenna of female. 64 diameters. Page 315. 



Fig. S2b. Leg of female ; co, coxa ; tr, trochanter; /, femur ; ti, tibia ; 

 ts, tarsus. 64 diameters. Page 316. 



Fig. 33. Fully developed male, from above. 25 diameters. Page 308. 



Fig. 33a. Antenna of male. 64 diameters. Page 309. 



Fig. 336. Leg of male : co, coxa ; tr, trochanter ; /, femur ; ti, tibia : ts, 

 tarsus. 64 diameters. Page 310. 



