74 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



At€ienius ovatulus Horn 



Figure 49 



Material examined: Six third-stage larvae reared Nov. 15, 1941, 

 by O. L. Cartwright (USNM) ; three third-stage larvae collected at 

 River Falls, S.C., Aug. 27, 1942, by O. L. Cartwright (USNM). 



Description: Maximum width of head capsule of thu'd-stage larva 

 0.89-0.99 mm. Cranium yellowish brown, surface smooth except 

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

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

 Clypeus distinctly divided into preclypeus and postclypeus. 



Epipharynx with protophoba bistichous on left and monostichous 

 on right; protophoba with 16-18 microsensillae; mesophoba mono- 

 stichous in the middle and polystichous on the sides. Crepide small 

 and subcircular; epitorma asymmetrical and flattened apically. 



Mandibles light yellowish brown with scissorial and molar area 

 dark brown. Each mandible dorsally with two setae and ventrally 

 with two setae. Brustia equally developed on both the mandibles. 



Maxillary stridulatory area with an irregular row of 13-19 conical 

 teeth facing cephalad; small toothlike markings behind the plectrum 

 and on cardo. Galea ventrally with a long seta and a row of four 

 short setae. 



Abdominal segments 1-8 each with three dorsal annulets; each 

 annulet with a transverse row of setae except the last annulet of 

 segments 6-8. On the annulets of segments 1-5 each prescutum 

 with six short setae, each scutum with three long setae and three 

 short setae on each side, and each scutellum with 10 short setae. 

 Segments 7 and 8 broad; segments 9 and 10 narrow, each with two 

 transverse rows of closely placed setae but dorsa not divided. 



Raster with teges of 26-31 and 34-37 hamate setae scattered 

 irregularly on the venter of 10th abdominal segment, three long and 

 slender setae on each side. Lower anal lobe divided into two ad- 

 jacent sublobes. 



Ataenius sp. 3 (strigatus group) 



Figures 33, 59, 75 



Material examined : Four third-stage larvae collected under grass 

 roots July 18, 1939, at Philadelphia, Pa. (USNM). [These larvae 

 were collected with one newly emerged adult of Ataenius spretulus 

 (Haldeman) but others in the strigatus group are found in the same 

 area.] 



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

 1.32-1.35 mm. Cranium yellowish brown, surface smooth. Three 



