PUTNAM ON PULVINARIA INNUMERABILIS. 303 



work in a lurva of the second stage ma<?nifled 2i)0 diameters. If we regard 

 it as magnified 275 diameters it would correspond to that of the newly 

 hatched larva. 



The buccal setce, four in number having been withdrawn from their 

 spiral coils, during the hatching, are now seen to be united into a bundle, 

 often called the beak, wliich f<^rins a large loop within the l)ody 

 cavity, reaching as far as the third or fourth abdominal segments. The 

 enlarged conical bases of the seta?, are iield in their places witliin the 

 frame-work above mentioned, while the anterior ends are still held in 

 the cavity of the labium, not having been yet protruded. 



The ihonxx is very large and occupies nearly one-tliird of the entire 

 length of the insect. Tiie prothorax is larger tlian botii the other seg- 

 ments taken together, and is deeply excavated in front to receive the 

 head, with which it is very intimately united. It is much narrower in 

 the middle than at the sides. There is a slight emargination near the 

 center of each side, opposite the anterior spiracles. Inserted in this 

 emargination is a rather stout movable spine accompanied by two more 

 slender spines in close proximity. Three or four other slender spines 

 occur at regular intervals on the margin of each side. 



The mesothorax is very much smaller than the prothorax. but is larger 

 than the metathorax. Both of these are very similar to the abdominal 

 segments in structure and appearance, each is ■• very little larger at the 

 sides than in the middle, and each is furnished with a single slender 

 spine on each side. Between the metathorax and mesothorax is an 

 emargination opposite the posterior spiracles, furnished with one large 

 and two small spines just as that on the prothorax. 



The legs have their insertions on the underside at a distance from the 

 margin equal to al out one-fourth of the width of the insect, and are 

 about equi-distant from one another. 



The anterior legs, fig. 25rt have their origin either side of and a little 

 posterior to the labium. The portion of tlie integument to which the leg 

 is attached {en) is quite flexible, thus giving the movements of the leg a 

 greater freedom. The coxa {Ir) is quite large, abnut one-and-a-half times 

 as long as thick, and bears one or two slender hairs. The trochanter 

 [y] is a small triangular piece closely and rigidly united with the femur of 

 which it appears as if simply a part. It bears one very long spiny hair. 

 The/e«mr (/) is the longest joint of the leg, but is of a little less diam- 

 eter than the coxa, Near the outer extremity are two slender hairs. It 

 moves upon the coxa in but one direction,— outwards. The tibia [li] is 

 a little shorter, Ibut nearly as largo as the femur. On the inner side near 

 the center it bears a long slender liair, and on the b ck two short hairs 

 near the middle and one longer one on the side near the extremity. It 

 moves upon the femur in but one direction, — inwards. The tarsus 

 consists of a single joint a little shorter ihan the tibia, slightly sinuous, 

 and tapering somewhat rapidly. It is furnished with several (thi-ee to 

 five) more or less, long slender hairs on the basai half, and with four 

 knobbed hairs, or digitules, and a single stout claw at the eud. It is 



