48 PROCEEDINGS OF THE NATIONAL MUSEUM tol. lu 



three dorsal rows of setae, but dorsa not subdivided into annulets. 

 Each abdominal spiracle-bearing area with 6-8 setae ventrally and 

 three or four setae dorsally. 



Tegillar setae scattered irregularly on the venter of 10th abdominal 

 segment. Anal lobes whitish, without setae; lower anal lobe entire. 



Key to known larvae of Aegialia Latreille 



1. Galea dorsally with five stout setae; raster with 48-58 hamate tegillar setae. 



lacustris LeConte 

 Galea dorsally with four stout setae; raster with 25-37 hamate setae. 



blanchardi Horn 



Aegialia lacustris LeConte 



Figures 25, 86 



Material examined: Seven third-stage larvae and cast skins of 

 10 third-stage larvae reared to the adult stage, being a part of 30 

 larvae collected in soil under willows along the roadside toward Adel, 

 Oreg., May 17, 1957, by Paul O. Ritcher. 



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

 1 .29- 1 .42 mm. Cranium yellowish white, surface smooth except for 

 two small depressions on each side of the frons, five or six dorsoepi- 

 cranial setae and three or four microsensillae on each side. 



Epipharjmx with 15-17 microsensillae along the base of the proto- 

 phoba. Maxillary stridulatory area with an u-regular row of 15-20 

 conical teeth. Galea dorsally with five stout setae. Lacinia dorsally 

 with a row of six long setae near the mesal edge and a single seta 

 posterioily. 



Abdominal segments 1-5 each with three dorsal annulets; each 

 prescutum with 12 short setae, each scutum with 4-6 long setae and 

 12-14 short setae on each side, and each scutellum with 16 short setae. 

 Raster with teges of 48-58 hamate setae curved at their distal ends. 



Aegialia blanchardi Horn 



Figures 2, 39, 53, 70 



Material examined : One third-stage larva, associated with adults, 

 collected under grass roots in sand dunes at Waldport, Oreg., July 16, 



1955, by Paul O. Ritcher and Manohar Jerath (adults determined by 

 O. L. Cartwright) ; 20 third-stage larvae and the cast skins of 10 third- 

 stage larvae reared to the adult stage, being part of a large number 

 collected under grass roots in sand dunes at Waldport, Oreg., June 12, 



1956, by Paul O. Ritcher and Manohar Jerath; and 4 third-stage 

 larvae, associated with adults, collected under grass roots in sand 

 dunes at Waldport, Oreg., May 29, 1957. by Manohar Jerath. 



