126 Journal New York Entomological Society. [v^oi. v. 



the empty larva skin, which remains adhering to the leaf, still present- 

 iii^' the appearance of the figure. 



The second parasite {Crypturus ^^r/ Ashm.) is even more abun- 

 dant, infesting nearly half of the cocoons found. It shows no sign till 

 the larva has spun, wh^n, instead of the moth, the hymenopteron ap- 

 pears, eating a jagged hole in the cocoon, instead of emerging by the 

 lid. The full grown larvae of the insect may be found by opening the 

 Calybia cocoons at the right time. It is flattened ventrally, dorsal seg- 

 ments arched, distinctly segmented, 13 segments including the head. A 

 prominent substigmatal ridge along joints 5 to 12, just below the small 

 spiracles, fluted by the incisures. The body is thickest at joints 7 and 

 8 and tapers each way to the rounded ends. Head small, membran- 

 ous, rounded, smooth, somewhat bulging in the position of the imaginal 

 eyes ; no ocelli ; antennae represented by two tiny points ; labium some- 

 what prominent, the only distinct organ, with folds or sutures marked 

 faintly in brown. Color uniform whitish yellow, slightly shiny, rather 

 opaque. Dorsal vessel less opaque, appearing darker, substigmatal 

 ridge whitish. The skin surface, except on the head, is marked with 

 very small rounded colorless granules, regularly spaced at about twice 

 their own diameter from each other. The diameter is about .01 mm. 

 Length of larva 6.5 mm., greatest width -^-Z '^'^•t greatest thickness 

 2.5 mm. 



Mr. Ashmead's description of these parasites has appeared in the 

 Canadian Entomologist. 



EXPLANATION OF PLATE V. 



Fig. I. Egg; unfertilized X 13- Fig- '5- Larva, stage I fsemidiagram- 



matic). 



" 16. Subdorsal spine of stage I en- 

 larged. 



" 17. The same, not fully expanded. 



" 18. Skin setK of mature larva, en- 

 larged. 



" 19. A short, stiff hair. 



" 20. A long, feathered hair. 



" 21. Short, feathery or branched hair. 



" 22. Mature larva X 4- 



" 23. Parasitized larva. 



" 24. Cocoon on a twig. 



" 25. Moth of Calybia slossotiuz. 



