12 CIRCULAR 3 3 4, U. S. DEPARTMENT OF AGRICULTURE 



PLECTRIS ALIENA (Chapin) 



Length 28 mm. Form medium. 



Width of head 3.5 mm. 



Surface of head: Shining, rather coarsely, shallowly reticulate. Epicranial 

 stem a narrow impressed line through a slight swelling. Postclypeal 

 margin of front with numerous fine punctures ; above these two paramedian 

 pits ; below curve of epicranial arm one large setose puncture and several 

 minute ones. Epicranial arms finely impressed. 



Color of head : Dull yellow. 



Epipharynx (fig. 8) : Outline of labrum very angular, margins irregular. 

 Marginal spines coarse. Marginal striae distinct, long, sinuous and some- 

 times interrupted. Sensory eminence with numerous large and small 

 sensillae arranged in a transverse arcuate line. Five large fixed teeth. 

 Sensory hairs near tormae numerous and coarse. Torinae short and stout. 



Raster (fig. 8) : Straight, pointed spines arranged in a large, spreading V made 

 up of 1 to 3 ranks of the inward-pointing spines. Outside of this about 3 

 irregular rows of larger, outward-pointing hooked spines. End and sides 

 of terminal segment with many rather long brown hairs, the former with 

 interspersed short stout spines. 



Anal slit: Transverse, V-shaped. 



Vestiture : A few scattered long hairs over entire surface of grub. The usual 

 small brown dorsal setae rather dense and conspicuous. 



Habitat : Turf of golf courses, etc. 



Remarks : A species of probably South American origin now found in the 

 South Atlantic States. While generally resembling common white grubs, 

 this larva is very different in details of structure, as shown in the drawings. 



