Ai!T. 2 LARVAE AND PUPAE OF THE FAMILY LEPTIDAE GREENE 1 1 



rugose band along the basal margin; last segment swollen laterally, 

 with four pairs of bristles arranged in a transverse row across the 

 middle of the dorsum ; apex bilobed, each lobe rounded apically and 

 terminating with a large bristle ; ventrally, the posterior margins of 

 segments from 1 to 7 are provided with a transverse row of bristles 

 in continuation of the dorsal rows, and medianly on the ventral side 

 of the last segment are two small tubercles which terminate in a 

 laterally projecting spine. 



Length, 12-15 mm. ; width of thorax, 2.25-3 mm. 



ATHERIX VARIEGATA Walker 



Plate 1 



Habitft. — The eggs are deposited in dense masses attached to dry 

 branches overhanging Avater. Numerous females contribute to the 

 formation of these egg masses and they also remain there and die. 

 The larvae hatching drop into the v\ater, where tliey are predacious. 



Larva {fig. 5). — Large, luteous, cylindrical, smooth; 11 segments; 

 first four segments tapering anteriorly ; the caudal segment with two 

 long processes; prolegs well developed. Both thoracic and abdomi- 

 nal spiracular plates undeveloped. Head quite small, Avell developed, 

 retractile; antenna small, cylindrical, pointed, about four times 

 longer than its diameter. Segments 1 to 3 ha\'e three large bristly 

 hairs on each side, arranged in a vertical row ; segment 4 has a small, 

 pointed tubercle on the latero-dorsal portion, and one pair of well 

 developed prolegs (fig. k) Avitli large, hook-like spines on their 

 ventral surfaces; posterior to each proleg are two spine-like hairs; 

 segments 5 to 10 similar to the fourth but larger, the tubercles are 

 larger and there is an additional pointed process on the lower an- 

 terior part of the side; this process is much longer on the tenth seg- 

 ment; last segment slightly smaller than the preceding segment and 

 has two pointed, plumose processes which are slightly longer than 

 the segment; on the side of the segment is a horizontal row of long, 

 delicate yellow hairs ; anal opening on the dorsum between the bases 

 of the two processes ; on the dorsum, on each side, is a group of three 

 long bristly hairs, and on the A'enter is a single median proleg; pos- 

 terior to this and above it is a transverse, elliptical, smooth, white 

 respiratory organ, which can be inflated. On the ventral surface of 

 each of the abdominal segments from 1 to 7 and posterior to the pro- 

 legs, is a pair of bristle-like hairs; at the ventral base of each caudal 

 process there is also a bristle-like hair. 



Length, 18 mm. ; diameter, 2.25 mm. 



Beltsville, Md., in Paint Branch, July 2, 1922, H. S. Barber, 

 collector. 



