CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 345 



B. Fore wings without closed submarginal cells. 



C. Abdomen and antennae long; body smooth and black. — Pele- 

 cinidce, p. 352. 

 CC. Abdomen and antennae short; body colored and often sculptured. 

 — Chrysidida; (Cuckoo Flies). 

 BB. Fore wings with one or more closed submarginal cells. 

 C. Abdominal stalk normal. 



D. First segment of the tarsus of the hind leg more or less 

 compressed, at least on inner side, and often thickly hirsute. 

 — Group Apoidea (Bees) (Fig. 229), p. 356. 

 DD. First segment of the tarsus of the hind leg more or less 

 cylindrical, neither markedly broadened nor hairy. 

 E. Fore wings folded once lengthwise; antennae usually 

 clearly bent at an angle; pronotum extending back so as 

 to touch or reach above the tegulae. — Group Vespoidea 

 (Wasps), p. 356. 

 EE. Fore wings not folded lengthwise; hind angles of 

 pronotum remote from and below the tegulae. Ab- 

 domen appended or pedunculate, oval or broadest 

 anteriorly, gradually tapering posteriorly. — Group 

 Sphecoidea (Digger and Mud Wasps), p. 356. 

 CC. Abdominal stalk formed of one or two knots or scale-like rings; 

 antennae flagelium-like. — Group Formicoidea (Ants), p. 359. 



The classification given above is deemed suflicient for the purposes 

 of this book, but recent monographs show a breaking up of many of 

 the old families into new ones, with new groupings. (See Hymenoptera 

 of Connecticut, Bull. 22, State Geol. and Nat. Hist. Survey, 1916.) 



TENTHREDINID^ (SAW-FLIES) 



Currant Stem Girdler {Janus integer Norton). — Adult. A slender 

 black saw-fly with yellowish legs; male smaller than female, with 

 abdomen brownish-yellow. Abdomen in female is half reddish-orange 

 and half black. May. Stem girdled by female. 



Eggs. — Deposited in pith of cane; elongate-oval, yellowish-white, 

 3'^5 inch long. Laid in May and June; hatch in about 11 days. 



Larva. — One-half inch long, straw color; head darker yellow; thoracic 

 segments broadest; tip of abdomen with a horny brown bifid spine. 

 Tunnels in the pith. Winters in a silken cocoon. 



Pupa. — Formed in April; white. Wilting of cane occurs in May. 



Control. — Cut off and burn infested canes 8 or 10 inches below 

 the girdled part, in June or fall. 



