6 CIRCULAR- 3 3 4, U. S. DEPARTMENT OF AGRICULTURE 



Easter (fig. 6) : Two paramedian rows of short, stout, well-separated spines 

 o to 7 on each side. Outside of these are widely spaced, heavy, hooked 

 spines about twice as long. On the sides of the terminal segment are 

 a few long scattered hairs. The end is clothed densely with somewhat 

 shorter hairs. 



Anal slit: Y-shaped. 



Vestiture: Entire grub sparsely clothed with long yellow hairs. Dorsal con- 

 vexities of first five abdominal segments with numerous short, brown 

 spines. 



Habitat: Soil of nurseries, lawns, and fields. 



Remarks : The rather slender form and the anal characters distinguish this 

 common grub. 



AUTOSERICA CASTANEA ARROW 



(Introduced) 



Length 15 mm. Form rather slender. 



Width of head 2.5 mm. 



Surface of head: Shining, mostly glabrous, but with two short, fine setae on 



each side of vertex, and one in a circular depression just below epicranial 



branch on each side of front. Epicranial arches very faintly discernible. 

 Color of head: Pale ocher (dull yellow). 

 Epipharynx (fig. 4) : Curved sclerotized bar below continuous and joining 



sclerotized plate on right of sensory eminence. Long spines at each side 



of sensory eminence more numerous and more closely placed. Left torma 



slender but rather short. 

 Raster (fig. 6) : The transverse curved row of brown spines composed of 18 



to 20. The short spines anterior to this (below in drawing) small and 



numerous. 

 Anal slit: Longitudinal, forking dorsad. 

 Vestiture: The first six abdominal segments evenly covered dorsally with 



very short brownish setae interspersed with a few long fine hairs. 

 Habitat : Soil of fields, gardens, and lawns of infested areas. 

 Remarks : This rather slender grub is very active and restless. The very 



short claw of the leg is characteristic. 



SERICA SIMILIS LEWIS 



(Introduced) 



Length 15 mm. Form rather slender. 



Width of head 2 mm. 



Surface of head: As in Atttoserica eastanea. 



Color of head : As in A. eastanea. 



Epipharynx (fig. 4) : Curved sclerotized bar below apex not apparent in the 



specimens examined. Long spines at each side of sensory eminence large 



and more numerous than in $. parallela. Left torma rather long — longer 



and more slender than in A. eastanea. 

 Raster (fig. 6) : Transverse, curved row of brown spines composed of 14 to 



18. The short spines anterior to this few in number and very coarse — 



much fewer and coarser than in A. eastanea. 

 Anal slit : As in A. eastanea. 

 Vestiture : Similar to that of A. eastanea. 

 Habitat : Soil of limited areas on Long Island. 

 Remarks : Only rather undeveloped third-instar larvae have been available 



for examination. See remarks under Serica parallela. 



SERICA PARALLELA CSY. 



Length 15 mm. Form somewhat slender. 



Width of head 2.3 mm. 



Surface of head: As in Autoserica eastanea. 



Color of head : As in A. eastanea. 



Epipharynx (fig. 4) : Curved sclerotized bar below apex interrupted at middle. 



Long spines at each side of sensory eminence few and distant. Left 



torma short and stout. 



