742 



NEW YORK STATE MUSEUM 



are 17 jointed and in the male are about the length of the 

 insect. The first joint is subconical, second ovoid and the re- 

 mainder are pediceled, the pedicel being nearly as long as the 

 enlarged part. The bulb of each segment is irregularly setose, 

 with the hairs as long or longer than the entire segment. Cer- 

 tain of the light dots are connected by lighter strips which 

 appear on focusing to be slightly below the surface of the seg- 

 ment. The female antenna is about 

 one half the length of the insect, 

 the first and second segments being 

 about the same as in the male. 

 There are lines of light dots on 

 each segment much like those re- 

 corded for Diplosis se tiger a 

 Lintn. Each joint is also irregu- 

 larly ornamented with setae, about 

 as long as the segments, that arise 

 from large, pitlike depressions. 

 The characters of male and fe- 

 male antennae are shown on plate 

 2, figures 5, 6. The two distal seg- 

 ments are occasionally fused to- 

 gether. The palpi are four-seg- 

 mented, the two distal joints are 

 nearly equal in length, the basal 

 joint is the shortest and the sec- 

 ond intermediate. The thorax is 

 ornamented with two converging 

 rows of silvery hairs, and a short 

 row of smaller ones occurs on 

 each humeral angle, and the metathorax is tipped with a trans- 

 verse row of the same vestiture. The wings are sparsely 

 covered and well fringed with fuliginous hairs. The venation 

 is represented in figure 14. The halteres are long, slender 

 and tipped with pale yellow. The legs are very long and 

 slender, claws bifid, toothed and with well developed empodium 



Fig. 15 Ventral aspect of pupal skin of 

 Rhabdophaga salicis, much enlarged 

 (original) 



