340 THE GYPSY MOTH. 



much shorter and stouter (Plate 51, Fig. 3). The pectina- 

 tions of the male antennae (Plate 50, Fig. 5) are somewhat 

 curved, and taper slightly toward the outer end, where they 

 terminate in a tooth on one side and a much longer spine 

 on the other; there are numerous hairs, about twice as 

 long as the diameter of the pectinations, scattered over the 

 surface. Plate 50, Fig. 6, shows a portion of a pectination, 

 with the bases of four of these hairs, and still finer hairs, 

 scattered over the surface, which is thrown into very minute, 

 irregular longitudinal ridges, visible only under a high power 

 ol the microscope. The female antennae (Plate 51, Fig. 3) 

 have minute, elongated, tooth-like scales and bristle-like 

 hairs over the surface (Plate 51, Fig. 4), and the pecti- 

 nations are cylindrical, stout and terminate obliquely in a 

 point at the outer end, near which, on the lower side, is a 

 short bristle. There are minute hairs sparsely scattered over 

 the surface, as shown in Plate 51, Fig. 4 6, and scattered be- 

 tween these are minute pits, around the edge of which is a 

 row of minute hairs (Plate 51, Fig. 4 ). 



The legs (Plate 51, Figs. 5, 6 and 7) are moderately 

 long and of medium size, with the first or coxal segment 

 somewhat conical in form ; the second segment (trochan- 

 ter) much smaller, its length being about equal to the 

 thickness; the third and fourth segments (femur and tibia) 

 are of nearly equal length. The outer part of the leg (tar- 

 sus) consists of five segments, the first of which is about the 

 length of the three following, and the last has a pair of di- 

 verging claws at the end, with a fleshy organ (pulvillus) be- 

 tween them (Plate 51, Figs. 9 and 10). The claws have a 

 somewhat flattened under surface, with a row of small blunt 

 teeth along each side. The fore legs (Plate 51, Fig. 5) have 

 a long sinuous spur (tibial epiphysis) attached to the tibia 

 near the base and extending a little beyond the end. The 

 whole side of this epiphysis next to the tibia is covered with 

 fine bristles, forming a brush-like organ. The tibiae of the 

 middle legs have a pair of unequal spurs at the end, and the 

 hind tibiae have a similar pair at the end and a pair about one- 

 fourth of the length of the tibia above. All these spurs have 

 the outer part obliquely flattened, with a row of short, blunt 



