SPONGILLA-FLIES — PARFIN AND GURNEY 435 



Cey to third-instar larvae of Sisyra vicaria, Climacia areolaris, and C. 



californica 



Tubercles long, pronounced, with two or three small setalike acute projec- 

 tions at bases of setae (see fig. 5) Climacia areolaris (Hagen) 



Tubercles shorter, with no small setalike acute projections at bases of setae . 2 



10th abdominal segment large, usually over y2 as wide as 9th segment; ventral 

 median setae of 8th abdominal segment much closer together than setae 

 of 9th segment; group of two setae on small papillae on each side on 9th 

 segment ventrally (fig. 4, a) Sisyra vicaria (Walker) 



10th abdominal segment of moderate size, less than }^ as wide as 9th segment; 

 ventral median setae of 8th segment only slightly closer together than those 

 of 9th segment; group of three setae on small papillae on each side of 9th 

 segment (fig. 4,b) Climacia californica Chandler 



bte: In fully developed second-instar larvae of areolaris, the small setalikc acute 

 ejections at bases of setae are visible. 



FiRST-iNSTAR LARVA (fig. 3,a) : The newly hatched larva of S. 

 .^cata is about 0.5 mm. long exclusive of mandibles and maxillae, 

 itli the jaws about 0.13 mm. long; that of C. areolaris is approxi- 

 ately 0.35 to 0.5 mm. long exclusive of jaws, with the jaws from 

 1 to 0.14 mm. in length. The head is almost the same width as 

 le thorax and sometimes slightly broader. The antennae of both 

 )ecies are 5-segmented, with the basal segment broader and shorter 

 lan the second or third, the thu*d longer than the second, the fourth 

 a,rrower, the fifth segment very narrow, acute, and with an apical 

 ha., and the third with a distal spine running parallel with the fourth 

 id usually fifth segments. The jaws are short, stout, straight, 

 ightly longer than the head, and about two-thirds as long as the 

 itennae. The frontal suture, not always apparent, is linear, ex- 

 snding almost to the pronotal margin, where it meets the coronal 

 nture. 



The legs are similar and each bears a long, slightly curved, sharp, 

 ipering claw almost as long as the tarsal segment, which approaches 

 le tibia in length. Each thoracic segment bears a pair of dorsal 

 lackish sclerites (sometimes more readily seen after treating the 

 oecimen with KOH solution). 

 In both genera there is a pair of anterodorsal setae on the vertex. 

 Running the length of the thorax and abdomen are four rows of setae, 

 ^0 dorsal and two lateral (one on each side). On the pronotum are 

 n anterodorsal and a posterodorsal pair of setae, the anterior pair 

 lore widely separated than the posterior pair, but closer in areolaris 

 ban in. fuscata. On the raeso thorax and metathorax are two postero- 

 lorsal pairs, with the setae more widely spaced than on the abdomen; 

 iterally, there is one seta on each side. On each of the first eight 

 bdominal segments is a pair of posterodorsal and a lateral papilla 

 n each side, each bearing a pair of setae, which become longer towards 



