LARVAE OF APHODIINAE — JERATH 83 



laterally and one long seta dorsally. Clypeus not distinctly divided 

 into preclypeus and postclypeus. Lacinia dorsally with a row of 

 four or five long setae near the mesal edge and one short seta pos- 

 teriorly. Galea ventrally with a long seta and two short setae. 

 Spiracular concavity facing ventrally. Each abdominal spiracle- 

 bearing area with two setae ventrally and one seta dorsally. Lower 

 anal lobe divided into two sublobes placed adjacent to each other. 



Key to known larvae of Pleurophorus 



Second and third antennal segments subequal, first long; laeotorma small as com- 

 pared to dexiotorma in size; each mandible dorsally with a single seta. 



caesus (Creutzer) 

 First and third antennal segments subequal, second short; laeotorma and dexio- 

 torma more or less similar in size; each mandible dorsally with two setae. 



longiilus Cartwright 



Pleurophorus caesus (Creutzer) 



Figures 6, 22, 36, 64, 73, 89 



Material examined: Two third-stage larvae collected at San 

 Francisco, Calif., June 11, 1934, by P. C. Ting and J. B. Stinweden 

 (FOR) ; one third-stage larva, associated with two adults and a pupa, 

 collected in potato hills at Wapota, Wash., July 14, 1941, by L. J. 

 Lipovsky (USNM). 



Description: Maximum width of head capsule of third-stage larva 

 0.79-0.81 mm. Cranium brownish yellow, surface smooth except 

 for two depressions on each side on the frons. Four dorsoepicranial 

 setae and one microsensilla on each side. Second and third antennal 

 segments subequal, first longer than second or third. 



Epipharynx with protophoba tristichous or bistichous on the left 

 and monostichous on right; protophoba with 12-13 microsensillae. 

 Crepide small, subchcular, and with two microsensillae. Tormae 

 asymmetrical; dexiotorma produced cephalad and caudad; laeotorma 

 smaller than dexiotorma. 



Dorsal annulets of abdominal segments 1-5 with setation as follows: 

 each prescutum with 10 short setae, each scutum with three long 

 setae and nine short setae on each side, and each scutellum with 12 

 short setae. 



Raster with teges of 28-31 hamate setae scattered irregularly on 

 the venter of 10th abdominal segment, three or four long setae on 

 either side. 



Pleurophorus longulus Cartwright 



Figures 21, 51, 65 



Material examined: One third-stage larva associated with a pupa 

 and adults, collected in soil samples from experunental plots at Gulf- 



