March 1897 ] Dyar : Larv.^^ OF Saw-Flies. 23 



The following species have been named by Mr. C. L. Marlatt : 



Schizocerus prunivorus Marlatt. 



-Egg. — In a pyriform slit under the lower epidermis at the middle 

 of one edge of the leaf; laid singly. The larva hatches and eats a curi- 

 ous winding slit down into the leaf; later this reaches the edge. 



Stage I. — Head pale greenish testaceous, eye black ; width .4 mm. 

 Body segments well marked, the incisures more perpendicular in front 

 than behind, faintly 3-annulate. Translucent with a greenish tint; ali- 

 mentary canal visible. Thoracic feet large, colorless with black shades 

 at their bases; abdominal ones very small on joints, 6 to 1 1 and 13, 

 colorless; joint 13 slightly bulging, with very small anal prongs. 



Stage II. — The same ; head green, width .6 mm. 



Stage III. — Head .75 mm. All leaf green, blackish shades at the 

 bases of the abdominal feet, eye black, mouth brown. Large suranal 

 prongs green and a smaller more approximate subanal pair. Joint 13 

 a little enlarged. On joints 5 to 13 a series of small, colorless, eversible 

 lateral glands. Abdominal feet rudimentary. 



Stage IV. — Head 1.15 mm. All leaf green, a little brownish at 

 the vertex, eye black. Body leaf green, shining, 3-annulate, food 

 darker. Thoracic feet clear with a blackish cloud at base ; abdominal 

 ones rudimentary. Six anal prongs ; a small pair at end of plate, a large 

 lateral pair, reddish tinted and the small subanal pair. Lateral glands sit- 

 uated substigmatally, posterior. Subventral ridge distinct; tracheal 

 line fine. 



Stage V. — Head pale green, thickly brown dotted, eye black; width 

 1.4 mm. Body green, faintly 3-annulate, slightly blotched with yel- 

 lowish subventrally ; a black subventral shade on the thorax in spots at 

 the bases of the feet which are green, clearer at tip. Subventral ridge 

 fluted, glands small ; the four suranal prongs brownish, subanal pair 

 green. Tracheal line distinct ; spiracles dark ; no marks. Cocoon in 

 the ground, reticular, of yellow silk. 



Found on Pniniis pennsylvanica and Amelanchier cajiadensis at 

 Jefferson Highlands, N. H., and on Primus serotina at Bellport, Long 

 Island, N. Y. 



Camponiscus americana Marlatt. 



Head pale brown, shining, eye black ; width 1.5 mm. Thorax en- 

 larged, the feet spreading, pale ; abdominal ones on joints 6 to 1 1 and 

 13. Segments indistinctly annulate, incisures well marked, folded. 

 Whitish, not shining, the food makes the dorsum to spiracks green, the 



