94 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



Corymbites affinis (PaykuU), Germar, Zeitschr. fiir die Ent., vol. 4, p. 63, 



1843. 

 Corymbites (Haplotarsits) affinis (Paykull), Schenkling, Coleopt. Cat. (ed. 



Junk), vol. 2, pt. 88, p. 381, 1927. 



The larva of this European species is described by Beling (1883, 

 pp. 276-278; 1884, p. 204). It is a woodland species, living chiefly 

 in the litter and soil of drier parts of forests and to a lesser degree in 

 decaying stumps. Pupation occurs in the last half of July and in early 

 August. No reference to this species was found in the economic 

 literature. 



Beling's description is inadequate, both for the accurate identifica- 

 tion of the larva and for determining its relationships. Specimens 

 were not available for use in the present study. 



The most important characters given by Beling may be summarized 

 as follows : Up to 20 mm. in length and 2.5 mm. in breadth. Much 

 flattened, moderately covered with hairs, and finely punctulate. 

 Dorsum brown or yellowish brown. One "sensory" appendix on 

 second segment of antenna. Mandible with relatively small retinac- 

 ulum. Ninth abdominal segment flattened, with 3 well-rounded 

 teeth on each lateral margin of dorsum. Urogomphi short and thick, 

 bifid; outer prongs slightly larger than inner prongs and projecting 

 obliquely upward. Caudal notch large, bootjack-shaped, wider than 

 long, slightly narrowed posteriorly. 



THE LUDIUS ROTUNDICOLLIS GROUP 



Figures 14, h, j; 21 ; 22, a, b, c, e 



KEY TO SPECIES 



From North America ; dorsum not distinctly patterned 2 



From Europe; dorsum v^rith distinct pattern of bright brown spots on 

 pale yelloviT background (fig. 22, o) ; urogomphal prongs subequal 

 (fig. 22, c, e) cinctus (Paykull) (p. 104) 



Without definite impressions on mediotergites of mesothorax and meta- 

 thorax ; with conspicuous seta near center of each abdominal medio- 

 tergite (fig. 21, e) ; inner prongs of urogomphi small {ipr, fig. 

 21. 9) 3 



Small, but definite impressions on mediotergites of mesothorax and 

 metathorax; without conspicuous seta near center of each ab- 

 dominal mediotergite ; inner prongs of urogomphi moderately de- 

 veloped {ipr, fig. 21, c, d) ; eastern United States 



sulcicoUis (Say) (p. 102) 



