LARVAL TAXONOMY OF THE TROGINAE IN NORTH AMERICA 37 



row of about 12 sensory' spots. Tormae with prominent anterior 

 epitorma and pointed pternotormae. Hypopharynx with smaller 

 distal area usually with 2 sensory spots distad of transverse row of 

 about 12 sensory spots. Maxilla with lacinia with 3 unci and about 

 12 to 15 marginal setae. 



Prothorax usually with 1 seta on anterior and posterior lateral lobes. 

 Infraepisternal area usually with 1 seta; infraepimeral area usually 

 with 2 setae. 



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 5 long setae on posterior lateral lobe. Infraepisternal area 

 usually without setae ; infraepimeral area with about 1 to 2 setae. 



Abdomen (dorsal aspect) with DLl of segments 1 to 4 with single 

 transverse row of about 14 to 20 spinules, DL3 with transverse row of 

 about 4 to 10 spinules. Segment 7 with transverse row of about 10 to 

 16 spinules, often with few intermixed setae. DL2 with transverse row 

 of long and short setae. DL3 often with 1 or 2 small setae. 



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

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



Trox sordidus LeConte 



Trox sordidus LeConte, 1854, Proc. Acad. Nat. Sci. Philadelphia, vol. 7, p. 211. 



Description based on the following material. Sixteen larvae reared 

 from 21 adults collected at chicken remains about 4 miles north of 

 Bronson, Sabine Co., Tex., July 7, 1964, by David R. Smith and 

 Charles W. Baker. Three larvae collected in soil under same chicken 

 remains by David R. Smith and Charles W. Baker. 

 LI : head capsule width 1 .39 to 1 .46 mm. ; 5 specimens. 

 LII : head capsule width 1 .67 to 1 .83 mm. ; 5 specimens. 

 LIII: head capsule width 2.04 to 2.30 mm.; 9 specimens. 



Description of Third Stage Larva 

 Figure 19 



Cranium deep red brown, with about 6 long setae near each an- 

 tenna. Anterior setae of frons very short. Postclypeus with 2 setae on 

 each side. Epipharynx with about 6 or 7 stovit marginal setae on each 

 side of corypha. Haptomerum with 2 smaller sensory spots distad of 2 

 larger, setiferous sensory spots on sensory area. Haptomerum also 

 with about 2 to 4 widely separated, stout setae on each side caudo- 

 laterad of sensory area. Anterior region of pedium usually with group 

 of 4 smaller sensory spots distad of slightly arching, transverse row of 



