LARVAE OF APHODIINAE — JERATH 67 



These larvae were obtained largely from the U.S. National Mu- 

 seum; two species of Ataenius were from Paul O. Ritcher's personal 

 collection. 



Four genera studied here represent two clearly separable subgroups. 

 Ataenius and Ewparia belong in one group on the basis of the setae 

 on the frons and clypeus, antennal segments, shape of the tormae, and 

 the number of the tegillar setae on the raster. Aphotaenius and 

 Saprosites fall in a second group which lacks posterior frontal and 

 anterior frontal setae. In the same group, the clypeus has one seta 

 on each side, the galea has four dorsal setae, and the raster has but 

 few setae. 



In a personal communication, O. L. Cartwright of the U.S. National 

 Museum expresses the same idea concerning the relationships of 

 genera based on the adults of this tribe. 



Key to larvae of four genera of the tribe Eupariini 



1. Clypeus with one seta on each side; frons without posterior frontal and anterior 



frontal setae; maxillary stridulatory area either without teeth or with less 



than five teeth; raster with less than 23 tegillar setae 2 



Clypeus with three setae on each side; frons with two posterior frontal setae 

 and one anterior frontal seta; maxillary stridulatory area with more than 

 seven teeth; raster with more than 25 tegillar setae 3 



2. First, second, and third antennal segments subequal; lacinia without terminal 



uncus; maxillary stridulatory area without teeth; raster with 10-12 tegillar 



setae Saprosites Redtenbacher 



Second and third antennal segments subequal, first short; lacinia with terminal 

 uncus; galea ventrally with six or seven short setae; maxillary stridulatory 

 area with four or five conical teeth; raster with 19-23 tegillar setae. 



Aphotaenius Cartwright 



3. Galea ventrally with a row of six or seven short setae, dorsally with four stout 



setae Euparia Serville 



Galea ventrally with a row of four or five short setae, dorsally with three stout 

 setae Ataenius Harold 



Saprosites pygmaeus Harold 



Figures 7, 46, 62, 68, 83, 88 



Material examined: Two third-stage larvae, associated with 

 adults, collected under rotten logs at Kalawas, Oahu, Hawaii, Mar. 1, 

 1931, by "O. H. S." (USNM); four third-stage larvae and two 

 second-stage larvae collected at Palmyra Island, February 1948, by 

 N. L. H. lO-auss (USNM). 



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

 0.63-0.69 mm. Cranium light yellow, surface smooth. Frons on 

 each side with one long exterior frontal seta and a seta in each anterior 

 angle. Five dorsoepicranial setae and three microsensillae on each 

 side. First, second, and third antennal segments subequal, fourth 



