LARVAL TAXONOMY OF THE TROGINAE IN NORTH AMERICA 29 



Prothorax with about 4 setae on anterior lateral lobe and about 8 

 setae on posterior lateral lobe. Infraepisternal area usually with 1 

 seta; infraepimeral area with about 3 setae. 



Mesothorax with about 10 setae on lateral lobe. Infraepisternal area 

 usually without setae ; infraepimeral area with about 8 setae. 



Metathorax with about 2 setae on anterior lateral lobe, with about 

 10 setae on posterior lateral lobe. Infraepisternal area usually without 

 setae; infraepimeral area with about 8 setae. 



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

 transverse band of about 25 to 40 spinules. DL3 with transverse row of 

 about 8 to 14 spinules. Segment 7 with transverse group of about 30 

 short setae plus scattered spinules on DLl. DL2 with transverse band 

 of setae. DL3 with scattered setae. 



Abdomen (lateral aspect) with segments 1 to 8 with about 2 to 3 

 setae on LLl ; LL2 with about 4 to 8 setae; LL3 with about 2 to 4 setae. 



Trox spinulosus dentihius Robinsoa 



Trox (Trox) dentibius Robinson, 1940, Trans. Amer. Ent. See, vol. 66, p. 156, 



pi. 4, figs. 4, 14. 

 Trox spinulosus dentibius Robinson, Vaurie, 1955, Bull. Amer. Mus. Nat. Hist., 



vol. 106, p. 38, figs. 6, 251. 



Description based on the following material. Twenty-eight larvae 

 reared from adults collected at black light at the Southwest Research 

 Station, Cochise Co., Ariz., July 4-8, 1963, by Noel McFarland. Six 

 larvae reared from adults collected under a coyote carcass about 3.0 

 miles east of La Liaz, Otero Co., N. Mex., July 22, 1964, by David R. 

 Smith and Charles W. Baker. 



LI: head capsule width 0.99 to 1.03 mm.; 3 specimens. 

 LII: head capsule width 1.27 to 1.40 mm.; 10 specimens. 

 LIII: head capsule width 1.55 to 1.86 mm.; 21 specimens. 



Description of Third Stage Larva 



Figures 5 and 47 



Cranium orange brown to light red brown, with about 6 long setae 

 near each antenna. Anterior setae of frons reduced. Postclypeus with 

 2 or 3 setae on each side, if 3, then third is very short. Epipharynx 

 with about 5 marginal setae on each side of corypha. Sensory area of 

 haptomerum with 2 smaller sensory spots distad of 2 larger, setiferous 

 sensory spots. Haptomerum also usually with 2 setae on each side 

 caudolatcrad of sensory area. Anterior region of pedium usually with 

 4 sensory spots distad of slightly arching transverse row of about 10 

 sensory spots. Hypopharynx with smaller distal area with 2 sensory 



