CATALOGUE OF INSECTS. 241 



Family BYRRHIDiE 



These are known as "pill beetles," are small in size, usually black, with a 

 close silky iridescent pubescence which makes the species easily recognizable. 

 The legs and antennae are so arranged that they can be so closely folded to the 

 body as to be practically invisible. They live at the roots of grasses or in water, 

 and practically nothing is known of the early stages. 



NOSODENDRON Latr. 



N. unicolor Say. Atlantic City, two specimens (W), Snake Hill, Orange Mts., 

 g. d., rare (Bf), Ft. Lee, lily pond (Bt): feeds on sap of trees. 



CYTILUS Er. 



C. sericeus Forst. Hudson Co. (LI), Newark district, g. d. (Bf ), Fort Lee (Bt). 

 C. trivittatus Mels. Madison, V, 12 (Pr), Greenwood Lake, V, 22 (Lv). 



BYRRHUS Linn. 



B. americanus Lee. Sea shore, not common (W, Li), Fort Lee, Greenwood 

 Lake (Bt), Newark (Bf). 



LIMNICHTJS Latr. 



L. punctatus Lee. Newark, rare (Bf), Burlington County. 



L. ovatus Lee. Anglesea, II, 22 ( W), Lahaway, V, 28, on cranberry bogs. 



Family PARNIDJE. 



These are aquatic beetles, with long legs not fitted for swimming ; they are 

 usually gray or black, sometimes striped with yellow, and are found clinging to 

 the under sides of stones or wood debris in streams or ponds. They are oblong 

 in shape, convex, the division between thorax and body well marked. The 

 larvae are flattened and somewhat resemble crustaceans in appearance. 



PSEPHENUS Hald. 



P. lecontei Lee. Hemlock falls, not rare (Bf), Milburn, on stones in streams 

 (Bt), Echo lake, on stones and lily pads (Ds), Lake Macopin, abundant, 

 walking on large submerged stones (Lg). 



DRYOPS Oliv. 



D. lithophilus Germ. Clifton (LI), Newark g. d. (Bf), Orange Mts., in 

 streams (Bt), Palisades, VII, 26 (Lv), Lake Hopatcong (Pm), under 

 stones in running water (U). 



16 ENT 



