354 Keport of the Entomologists of the 



The manner in which the pupa escapes from the cocoon was 

 not satisfactorily observed. It was noticed, however, that old 

 cocoons, which had remained in the ground over winter, became 

 soft and spongy and hence easily broken. Also that from the 

 cocoons from which the adult insects had emerged a large irregu- 

 lar piece had been partially cut, as if by the jaws of the insect, 

 and broken off from the end. 



The adults. — As previously stated the adult insects appear 

 about May 10. They fly actively about during the heat of the 

 day, but in the early morning and toward evening or during un- 

 usually cool days they seek shelter on the under side of the leaves, 

 remaining sluggish until warmed by the rays of the sun. 



The female. — The following technical description is taken from 

 Mr. Edward Norton's monograph 7 of the Tenthredinidae : 



"Color black, head rather rugose, nasus somewhat incurved; 

 head pubescent except about ocelli; mandibles with 2 stout 

 inner teeth ; teguhe, most of anterior angle, the third, fourth, fifth 

 and part of sixth seguments of tergum yellowish white, venter 

 ferruginous; legs paler, their coxae and basal half of femora and 

 tips of posterior tibiae blackish; inner claw tooth large. Wings 

 smoky, hyaline, nervures brownish ; marginal cross nervure curved 

 and received near apex of third cell." 



Four specimens examined by the writer corresponded to his 

 description except in the color of the seguments of the tergum. 

 In each of these specimens the second joint, as well as the third, 

 fourth, fifth and part of the sixth seguments, is yellowish white. 

 There is, however, slight variation in the markings which indi- 

 cates that the difference in the markings of these specimens and 

 those described by Mr. Norton is probably one of variation. The 

 four specimens varied from 5 mm. to 6 mm. in length. (Plate 

 XXVIII, Fig. 2.) 



The male. — Length 4.5 mm.; black, teguhe and dorso-lateral 

 margins of collar yellowish white; middle and posterior legs 



7 Trans. Amer. Ent. Soc, 1: 250. 



