LARVAL TAXONOMY OF THE TROGINAE IN NORTH AMERICA 43 



P. Stephen and Charles E. Osgood. Three larvae reared from single 



adult collected at a dried coyote carcass about 2.0 miles east of Rodeo, 



Hildago Co., N. Mex., August 7, 1963, by Noel McFarland and 



Chris Schuberth. 



LI: head capsule width 2.11 to 2.15 mm.; 2 specimens. 



LII: head capsule width 2.85 to 2.90 mm.; 2 specimens. 



LIII: head capsule width 3.60 to 4.48 mm.; 17 specimens. 



Description of Third Stage Larva 

 Figure 1 1 



Cranium light red brown to dark red brown, with about 12 to 18 

 setae near each antenna. Each anterior angle of frons with about 

 5 to 8 setae. Epipharynx with about 20 stout setae near anterior 

 border on each side of corypha. With group of phobae mediad of 

 fused phobal mass on right side. Paria with about 8 to 14 posterior 

 setae and about 15 to 22 anterior setae on each side. Glossa with 4 

 sensory spots and about 14 to 16 setae dorsally; with 2 sensory spots 

 and 2 long setae ventrally. Maxilla with sdpes bearing 1 to 3 setae 

 on exterior surface. Maxillary stridulatory area with longitudinal row 

 of about 16 to 22 stridulatory teeth. 



Prothorax with about 40 to 50 setae on lateral lobe. Infraepistemal 

 area with about 1 to 4 setae; infraepimeral area with about 7 to 17 

 setae. 



Mesothorax with about 30 to 50 setae on lateral lobe. Infraepistemal 

 area usually without setae ; infraepimeral area with about 15 to 23 setae. 



Metathorax with transverse row of about 14 to 18 spinules and 4 to 7 

 setae on smaller dorsal lobe (DL2). Anterior lateral lobe (LLl) with 

 about 9 to 13 setae. Posterior lateral lobe (LL2) with about 25 to 60 

 setae. Infraepistemal area usually with 1 to 3 setae; infraepimeral area 

 with about 19 to 22 setae. 



Legs with each tibiotarsus with terminal whorl of 6 setae plus about 

 9 to 1 1 setae proximad of whorl. 



Abdomen with transverse row of about 10 to 16 spinules plus setae 

 on DL 1 of segmicnt 7. 



Omorgus fuliginosus (Robinson) 



Trox (Omorgus) fuliginosus Rohinson, 1941, Ent. News, vol. 52, p. 134. 



Description based on the following material. Twenty-one larvae 

 reared from 1 female and 5 males collected under 2 deer carcasses 

 1.0 mile south of Uvalde, Uvalde Co., Tex., June 29, 1964, by David 

 R. Smith and Charles W. Baker. 



285-935—63 4 



