1970] 
Erwin — • T'hyce harfordi 
53 
Description. The following combination of characteristics is dagnos- 
tic of the larvae of this species: Maximum width of head capsule 
7.0 to 7.3 mm. Head yellowish-brown in color, smooth, shiny. Hap- 
tomerum of epipharynx with 14 heli. Epipharynx without propleg- 
matia, the area covered instead with setae. Each plegmatium with 
11-12 short plegmata. Haptolachus with seven microsensilla. Max- 
illa with row of 12-13 short, conical, arcuate stridulatory teeth. 
Thoracic spiracles slightly larger than spiracles on abdominal segments 
1-5, which are all similar in size. Spiracles on abdominal segments 
6 to 8 progressively smaller. Anal slit transverse, slightly curved. 
Raster with 2 short, parallel, longitudinal palidia, each with 13 
short, sharp, pali. Septula narrow. Tegilla extending forward beyond 
the palidium for a distance equal to or slightly greater than half 
the length of the palidium. Preseptular setae more numerous than 
50 (50-100), adjacent lateral setae long. 
Habitat. The specimens were found in the “B horizon,” 14 to 48 
inches deep in sandy clay among the roots of cherry trees in what 
appeared to be an “old” orchard. The larvae found at 14 inches 
were upside down (supine) in pupal chambers, while the deeper ones 
were adjacent to the lower surface of roots of the cherry trees. 
I would like to thank P. O. Ritcher and J. Gordon Edwards for 
critically reading this manuscript and offering suggestions. 
Literature Cited 
Ritcher, P.O. 
1966. White grubs and their allies, a study of North American Scara- 
baeoid larvae. Oregon State University Press, Corvallis. 219 
pp., 501 figs. 
