June, 1898.] Dyar : New Species and Larvte ok Sawflies. 125 



more uniformly gray. The black points vary in distinctness, sometimes 

 obsolete. Occasionally the larva is very pale, an albino, with dull red 

 head and sordid white body marked with an olivaceous blackish lateral 

 band. 



No ultimate stage; cocoon dark brown, formed in the earth. Single 

 brooded. 



Larva referred to as "F" Can. Ent. XXVII, 339. 



Hemichroa albidovariata Norton. 



9 described by Norton (Trans. Am. Ent. Soc. IV, 81). 



$ closely similar to 9 with the three basal segments of abdomen 

 above yellowish white, the basal plates black. Two 9 9 , one $ from 

 Texas (Belfrage), coll. U. S. Nat. Mus., one 9 from larva at Bellport, 

 Long Island, N. Y. The larvae live on the black oak (Q. coccinea) in 

 May, eating the young leaves, resting on the edge, the abdomen slightly 

 curled. 



Stage V. — Head pale red-brown, eye narrowly black, mouth dark 

 brown; width 1.8 mm. (9). Feet on joints 6-12, 13, moderate; seg- 

 ments regularly and distinctly 6-annulate, spiracle on second annulet. 

 Color translucent fleshy brown, a lateral row of irregular black spots on 

 annulets 1 (small), 2-3 (large), 4-5 (rather small), the large one 

 broken on some segments; all absent on joint 13; anal plate immacu- 

 late. Some small black marks around spiracle ; a distinct black patch 

 on the anterior subventral fold and a smaller patch on the posterior one. 

 Feet and venter unspotted, but a black mark at the base of thoracic 

 feet. Dorsal vessel and paired dots on annulet 1 dusky translucent. 



No ultimate stage ; cocoon in the ground ; single brooded. 



Hemichroa phytophagica, sp. nov. 



9 extremely similar to H. albidovariata but the pale lines on an- 

 terior lobe of thorax are short and obscure and the basal plates of ab- 

 domen are black. 



One 9 bred from larva from Bronx Park, New York, and two 9 9 in 

 coll. U. S. Nat. Mus. marked "saw fly on white oak" from Miss Murt- 

 feldt, No. 241 M., Dept. Agriculture, No. 3168. 



Found on the young leaves of the white oak in May. 



In Bronx Park these larvse were mixed with those of H. fraiernalis , 

 and showed somewhat the same habits by eating away the leaf from the 

 midrib; but they do not use this as a perch and are true edge eaters. 



Stage I. — Head rounded shining black-brown ; width .4 mm. 



