LARVAE OF APHODIINAE JERATH 71 



5. Raster with teges of more than 39 setae 6 



Raster with teges of fewer than 39 setae (27-31, 34-37) (each mandible dor- 

 sally with two setae and ventrally with two setae; conical stridulatory 

 teeth on stipes 13-19) ovatulus Horn 



6. Frontal sutures distinct 7 



Frontal sutures indistinct (blunt stridulatory teeth on stipes 12-15) 



Ataenius sp. (strigaius group) 



7. Conical stridulatory teeth on stipes 13-16; raster with teges of 50-56 setae. 



strigicauda Bates 

 Blunt stridulatory teeth on stipes 9-11; raster with teges of 40 setae. 



brevis Fall 



8. Raster with teges of 50 or fewer setae 9 



Raster with teges of 54 setae (blunt stridulatory teeth on stipes 21-23; each 



mandible with two setae dorsally and two setae ventrally) . 



schwarzi (Linell) 



9. Clypeus not marked into preclypeus and postclypeus; lower anal lobe divided 



into two distinct sublobes placed remote from each other 10 



Clypeus marked into preclypeus and postclypeus; lower anal lobe divided into 

 two adjacently placed sublobes 11 



10. Raster with teges of 44-50 hamate setae; width of head capsule 1.32-1.35 mm. 



erratus Fall 

 Raster with teges of 34-43 hamate setae; width of head capsule 1.02-1.12 mm. 



imbricatus Melsheimer 



11. Stridulatory teeth on stipes 20-25; each mandible with two setae dorsally and 



one seta ventrally; width of head capsule 1.06-1.12 mm. 



plantensis (Blanchard) 



Stridulatory teeth on stipes 28-34; each mandible with two setae dorsally and 



two setae ventrally; width of head capsule 1.29-1.32 mm. . . . Ataenius sp. 



Ataenius sp. 1 (strigatus group) 



Figure 8 



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

 collected at U.S. Golf Association, Washington, D.C., July 1, 1924, 

 by M. C. Biber (POR). [This larva was associated with adults of 

 A. spretulus (Haldeman) and A. strigatus (Say). Other species in the 

 group may occur in the same area.] 



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

 1.19 mm. Cranium brownish yellow, subsurface smooth except for 

 two depressions on each side on the frons. Three dorsoepicranial 

 setae and two microsensillae on each side. Frontal sutures distinct. 

 Clypeus divided into smaller preclypeus and large postclypeus. 



Epipharynx with protophoba bistichous on left and monostichous 

 on right; protophoba with 16 microsensillae; mesophoba polys tichous. 

 Crepide small and subcircular; epitorma asymmetrical, flattened 

 apically and bent towards laeophoba. 



Mandibles brownish yellow with scissorial and molar area dark 

 brown. Each mandible dorsally with a single seta, ventrally with 

 two setae. Brustia well developed on left mandible but not so 

 developed on right mandible. 



