42 



N. E. McINDOO 



Both pairs of wings of the female geometric! moth, Alsophila 

 pometaria (no. 16), are invisible to the unaided eye, and are so 

 greatly reduced that the front wing (fig. 3 D) is only about three- 

 fourths as large as the tegula {Tg) and no larger than the patagia 

 (fig. 3 C) on the prothorax. The hind wing (fig. 3 E) is about 

 one-third as large as the front wing. No pores are present on the 

 ventral surfaces of the wings, and only two groups lie on the 

 dorsal surface of the front wing and only one on the hind wing; 



Fig. 3 Wings, tegulse {Tg) and patagia of so-called wingless female moths, 

 showing location of groups of olfactory pores and scattered pores on dorsal 

 surfaces of wings. A, tegula and front wing and B, hind wing of tussock moth, 

 Hemerocampa leucostigma, X 21; C, patagia, D, tegula and front wing and E, 

 hind wing of the geometrid, Alsophila pometaria, X 5.3. 



a few scattered pores were also seen on each wing. All of these 

 pores are larger than usual. 



To determine the individual variation in the total number of 

 pores, three specimens of the lesser wax moth, Achroia grisella 

 (no. 22), were examined. The total numbers of pores on the 

 legs and wings of these moths are 1112, 1168 and 1238. A 

 part of this variation may be attributed to sex, because the sex 

 of each individual was not determined. 



The following table (p. 43) includes the family, number and 

 name of the species, the number of olfactory pores on the legs, 



