1916] J]'iUiams — Egg-Parasites of the Apple Tree Tent-Caterpillar 153 



activity on the part of the females. Similar failures were noted in 

 the case of Ahlerus, Telenomus, and Ooencyrtus, but the rarity of 

 these insects rendered a fair trial impossible, and the results are 

 accordingly less surprising. 



The failure of No. 5 to oviposit normally is the more peculiar 

 in view of the fact that it frequently deposited eggs on the test- 

 tube wall. These eggs, which were rather large, were of the ordi- 

 nary stalked type. On one occasion some of these eggs apparently 

 developed as far as the first larval stage. These larvae were much 

 damaged when discovered, and could not be figured or described, 

 but a very distinct segmentation could be made out, and the form 

 appeared to be somewhat flattened. 



6. Aphycoideus io Girault., Family Encyrtidse. 



Two females issued from Box No. 2 before it had been fitted 

 with a tube. One was found walking about on the laboratory 

 desk, but the other was still in the box, so that there seems to be 

 no reasonable doubt as to their source. 



A specimen was sent to Girault, who pronounced it to be a 

 representative of a new genus. Its reddish-yellow color distin- 

 guishes it at a glance from any of the other species, all of which are 

 black or very dark. 



These observations was undertaken at the suggestion and under 

 the supervision of Professor Brues, whom I wish to thank for his 

 aid during its entire course. Professor Wlieeler, Dr. Chapman, and 

 many students of the Department, have also furnished literature, 

 or suggestions. I have already stated that I am indebted to Mr. 

 A. A. Girault for the identification of several of the species. 



References. 



Girault, A. A. Hosts of Insect Egg-Parasites in North and South 



America. Psyche, vol. xiv (1907). 

 Ashmead, W. H. Bull. Ohio Experiment Station, p. 163 (1893). 

 Bull. U. S. Nat. Mus., No. 45 (1893). 



Proceedings of the Entomological Society of Washington, vol. 

 iii, p. 10 (1893). 

 Howard, L. O. Insect Life, vol. vii, p. 7 (1894). 



