436 PROCEEDINGS OF THE NATIONAL MUSEUM vol.i, 



the tenth segment; on the eighth segment, the two dorsal papilla 

 are longer than on the other segments and the setae are very Ion 

 (median ones usually short) ; on the ninth segment is a posterior ro-i 

 of eight small papillae, each bearing a long seta and with the laten 

 setae usually closer together; tenth abdominal segment blunt, withoi 

 setae. 



The first-instar larvae of S. Juscata and C. areolaris could not ^ 

 satisfactorily compared because the areolaris larvae were nevf 

 hatched, poorly fed, and consequently thin, with characteristics nc 

 yet fully visible, whereas those oi Juscata were plump, well fed, an 

 exhibited characters much more clearly. The head of juscata wj 

 distinctly dark brown and appeared larger and longer in compariso 

 with the thorax than that of areolaris, showing the frontal sutuj 

 clearly and the vertex smoothly rounded. 



Brown (1952, p. 143) noted that after the areolaris larva is fed f( 

 several days, the length of the body may be doubled, with the abdome 

 becoming especially enlarged. 



Second-instar larva (fig. 3,b): Specimens of areolaris examine 

 ranged from 1.3 to 1.7 mm. long, exclusive of jaws, with the jav. 

 about 0.5 mm. long. The antennae are composed of sLx segment 

 with the long seta arising at the end of the fourth segment and runniii| 

 parallel to the fifth and sixth segments, and v/ith a small seta 

 arising from the distal end of the fifth; the second segment is til 

 longest, the thu'd short, the fourth longer than the third, and the fiftl 

 and sixth small, the sixth particularly narrowed. The mouthparj 

 become longer and more flexible. The head is smaller in comparisc 

 with the rest of the body, which takes on a distinctly fusiform shap; 

 widest at the metathorax and tapering anteriorly and posterior 

 The pronotal collar is beginning to become differentiated. The le 

 show a black ring around the distal ends of the femora and coxi 

 and a shortening of the tarsus proportionally. 



There is an additional pair of setae on the vertex just mesad of t 

 eyes. On the dorsum of the pronotum are two pairs of five setae 

 small papillae, with papilla x (fig. 3,b) usually bearing two set? 

 Each of the two dorsal rows of small papillae on the mesonotum an 

 metanotum and the first abdominal segment bears two pairs of seta 

 more widely spaced on the mesonotum and metanotum. On 

 second to seventh abdominal segments the two dorsal rows of papilli 

 bear three setae each; on the eighth segment the two dorsal tubercli 

 become longer and narrower, but still bear three setae each; on t 

 ninth segment there are only two enlarged stout lateral tubercld 

 which bear three setae each. Each tubercle of the lateral row 

 tubercles on the mesothorax and metathorax, and on the first seve 

 abdominal segments, bears three setae (which become progressives 



