LARVAL TAXONOMY OF THE TROGINAE IN NORTH AMERICA 25 



number. Both rows narrowly discontinuous in median region. Anal 

 opening surrounded by single dorsal lobe and 2 larger ventral lobes 

 (fig. 53). 



Species Descriptions of Trox Larvae 



Trox fascijer LeConte 



Troxjascifcr LeConte, 1854, Proc. Acad. Nat. Sci. Philadelphia, vol. 7, p. 213. 



Description based upon the following material. Twenty-eight 

 larvae reared from a single female taken in a black light trap in 

 Corvallis, Benton Co., Oreg., May 18, 1963, by Charles W. Baker. 

 LI: head capsule width 0.89 to 0.93 mm.; 2 specimens. 

 LII: head capsule width 1.20 to 1.24 mm.; 2 specimens. 

 LIII: head capsule width 1.64 to 1.86 mm.; 24 specimens. 



Description of Third Stage Larva 

 Figures 8 and 55 



Cranium light orange to light orange brown, with numerous promi- 

 nent pits. Median epicranial setae very small or absent. Exterior and 

 anterior setae of frons very small. Postclypeus with 1 long and 1 short 

 seta on each side. Epipharynx with about 5 to 6 marginal setae on 

 each side of corypha. Sensory area of haptomerum with 4 smaller 

 sensory spots distad of 2 larger setiferous sensory spots. Haptomerum 

 also with 1 large seta on each side of sensory area, seta on right side 

 usually only slightly removed from anterior border; distad of seta on 

 left side. Anterior region of pedium usually with 2 sensory spots distad 

 of transverse, slightly arching row of about 10 sensory spots. Tor mac 

 with short, stout pternotormae. Hypopharynx with smaller distal 

 area with 2 sensory spots distad of transverse row of about 10 sensory 

 spots. Maxilla with lacinia with 3 prominent unci and about 10 to 12 

 marginal setae. 



Prothorax with about 2 setae on anterior lateral lobe, usually with 

 about 4 setae on posterior lateral lobe. Infraepisternal region usually 

 with 1 seta; infraepimeral area usually with 2 setae. 



Mesothorax with about 4 setae on lateral lobe. Infraepisternal 

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



Metathorax with or without single seta on anterior lateral lobe. 

 Posterior lateral lobe wdth about 5 setae. Infraepisternal region usually 

 without setae ; infraepimeral area with about 2 setae. 



