156 REPORT OF NEW JERSEY STATE MUSEUM. 



ROCCONOTA Stal. 



R. annulicornis Stal. (Heza) Westfield VII, 2 (Bno) ; New Brunswick 

 VII, 27 (Coll). 



Fig. 65. The "wheel-bug," Arilus cristatus, in all its stages; natural size, 

 except the individual eggs, which are enlarged. 



ARILUS Hahn. 



A. cristatus Linn. (Prionidus) The "wheel-bug." Occurs throughout the 

 State, but more commonly in the southern sections. It is the largest 

 species of the family and conspicuous by its toothed thoracic crest, 

 which looks from the side like the segment of a cog-wheel. The egg- 

 masses are frequently found on fruit trees, but the insects are bene- 

 ficial rather than harmful. They feed on all sorts of slugs and cater- 

 pillars, and according to Mr. Davis, also take grasshoppers and 

 bumble-bees. 



ACHOLLA Stal. 



A. multispinosa De G. Throughout the State VI-X. "I have found this 

 dropping from elm and other trees in Westfield; it is highly pre- 

 daceous (Bno). 



