LARVAL TAXONOMY OF THE TROGINAE IN NORTH AMERICA 31 



Prothorax usually with 1 or 2 setae on anterior and posterior lateral 

 lobes. Infraepisternal and infraepinieral areas usually with 1 seta each. 



Mesothorax with about 3 to 6 setae on lateral lobe. Infraepisternal 

 area usually without setae; infraepimeral area usually with 2 setae. 



Metathorax usually without setae on anterior lateral lobe, with about 

 4 to 6 setae on posterior lateral lobe. Infraepisternal area usually 

 without setae; infraepimeral area usually with 2 setae. 



Abdomen (dorsal aspect) with DLl of segments 1 through 4 with 

 single transverse row of about 12 to 18 spinules, DL3 with transverse 

 row of about 6 to 10 spinules. Segment 7 with transverse row of about 

 10 to 16 spinules on DLl. DL2 usually with 2 spinules intermixed in 

 transverse row of setae. DL3 with or without a few scattered, small 

 setae. 



Abdomen (lateral aspect) with segments 1 to 8 usually with 1 seta on 

 LLl ; LL2 usually with 2 or 3 setae; LL3 usually with 1 or 2 setae. 



Trox frontera Vaurie 



Trox Jrontera Vaurie, 1955, Bull. Amer, Mus. Nat. Hist., vol. 106, p. 41, figs. 9, 

 10, 25M. 



Description based on the following material. Thirty-eight larvae 

 reared from 64 adults collected in soil under what was probably a very 

 old sheep or goat carcass about 0.5 miles east of Hebbronville, Jim 

 Hogg Co., Tex., July 14-15, 1964, by David R. Smith and Charles W. 

 Baker. 



LI : head capsule width 1.11 to 1.21 mm. ; 7 specimens. 

 LII: head capsule width 1.48 to 1.62 mm.; 13 specimens. 

 LIII: head capsule width 1.95 to 2.21 mm.; 18 specimens. 



Description of Third Stage Larva 

 Figures 16, 17, 18, and 44 



Cranium light orange to light yellow brown, with about 6 to 9 setae 

 near each antenna. Postclypeus with 3 setae on each side. Epipharynx 

 with about 7 to 10 marginal setae on each side of corypha. Sensory 

 area of haptomerum usually with 2 smaller sensory spots distad of 2 

 larger, setiferous sensory spots. Haptomerum usually also with 2 setae 

 on each side caudolaterad of sensory area. Anterior region of pedium 

 usually with 4 sensory spots distad of slightly arching row of about 10 

 to 12 sensory spots. Hypopharynx with smaller distal area with 2 

 sensory spots distad of transverse row of about 11 to 13 sensory spots. 

 Maxilla with lacinia with 3 unci and about 12 to 15 stout marginal 

 setae. 



