LARVAL TAXONOMY OF THE TROGESTAE IN NORTH AMERICA 45 



LI : head capsule width 2.46 to 2.55 mm. ; 5 specimens. 



LII: head capsule width 3.43 mm.; 1 specimen. 



LIII: head capsule width 4.04 to 4.75 mm.; 15 specimens. 



Description of Third Stage Larva 



Figures 13, 14, 23, 24, 30, 32, 33, 34, and 59 



Cranium dark red brown, with about 12 to 16 setae near 

 each antenna. Each anterior angle of frons with about 4 to 6 setae. 

 Epipharynx with about 20 stout setae near anterior border on each 

 side of corypha. Paria with about 12 to 24 anterior setae and about 

 7 to 14 stouter posterior setae on each side. Glossa with 4 sensory 

 spots and about 14 to 20 setae dorsally; with 2 sensory spots and 2 

 long setae ventrally. Maxilla with stipes bearing 1 to 3 setae on exterior 

 surface. Maxillary stridulatory area with longitudinal row of about 

 14 to 26 stridulatory teeth. 



Prothorax with about 25 to 32 setae on lateral lobe. Infraepisternal 

 area usually with 1 seta; infraepimeral area with about 5 to 7 setae. 



Mesothorax with about 20 to 30 setae on lateral lobe. Infraepisternal 

 area usually lacking setae; infraepimeral area with about 8 to 12 setae. 



Metathorax with transverse row of about 14 to 18 spinules and setae 

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

 5 to 10 setae. Posterior lateral lobe (LL2) wdth about 17 to 22 setae. 

 Infraepisternal area usually without setae; infraepimeral area with 

 about 10 to 12 setae. 



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

 11 to 15 setae proximad of whorl. 



Abdomen with transverse row of spinules on DLl of segments 1 

 through 6. Segment 7 with transverse row of about 14 to 18 intermixed 

 spinules and setae on DLl. 



Omorgus asper LeConte 



Omorgus asper LeConte, 1854, Proc. Acad. Nat. Sci. Philadelphia, vol. 7, p. 215. 



Description based on the following material. Twenty-two larvae 

 reared from 4 adults collected under an old crow carcass at the Boyce 

 Thompson Institute Forest Research Laboratory, Hardin Co., Tex., 

 May 12, 1964, by Robert I. Gara. 

 LI: head capsule width 2.10 to 2.30 mm.; 8 specimens. 

 LII: head capsule width 2.81 to 3.30 mm.; 5 specimens. 

 LIII: head capsule width 3.60 to 4.04 mm.; 9 specimens. 



