50 U.S. NATIONAL MUSEUM BULLETIN 279 



3 or 4 setae oa eacli side. Epipharynx with more than 2U stout setae 

 near anterior border on each side of corypha. Sensory area of hap- 

 tomerum often partially or entirely divided by sclerotized area into 

 2 areas with 2 sensory spots each. Paria with about 30 to 60 anterior 

 setae and about 10 to 14 stouter posterior setae on each side. Sense 

 cone of haptolachus with small clump of phobae at anterior end. 

 Glossa with 4 sensory spots and about 15 to 21 setae dorsally; with 



2 sensory spots and 2 long setae ventrally. Maxilla with stipes bearing 



3 to 8 setae on exterior surface. Maxillary stridulatory area with 

 longitudinal row of about 35 to 45 stridulatory teeth. 



Prothorax with about 60 to 80 setae on lateral lobe. Infraepisternal 

 area with about 3 to 5 setae; infraepimeral area with about 15 to 20 

 setae. 



Mesothorax with about 50 to 65 setae on lateral lobe. Infraepisternal 

 area with 1 or 2 setae; infraepimeral area with about 22 to 30 setae. 



Metathorax with transverse row of about 9 to 1 7 spinules and 4 to 

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

 with about 14 to 21 setae. Posterior lateral lobe (LL2) with about 

 40 to 45 setae. Infraepisternal area usually without setae; infraepi- 

 meral area with about 20 to 30 setae. 



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

 15 to 22 setae proximad of whorl. 



Abdomen with transverse band of about 8 to 14 spinules and about 

 45 to 60 setae on DLl of segment 7. 



Omorgus rubricans (Robinson) 



Trox {Omorgus) rubricans Robinson, 1946, Trans. Amcr. Ent. Soc, vol. 72, p. 57. 



Description based on the following material. Eighteen larvae reared 

 from 13 adults collected under a fawn carcass on the Rob and Bessie 

 Welder Wildlife Foundation, San Patricio Co., Tex., July 10, 1964, 

 by Charles W. Baker and David R. Smith. 

 LI: head capsule width 2.72 mm.; 1 specimen. 

 LII: head capsule width 3.25 to 3.60 mm.; 2 specimens. 

 LIII: head capsule width 4.04 to 4.65 mm.; 15 specimens. 



Description of Third Stage Larva 



Figure 10 



Cranium dark brown, with about 15 to 20 setae near each antenna. 

 With pronounced concavity mediad of eyespot. Concavity about same 

 size as eyespot, with single seta. Anterior border of concavity declivous; 



