100 NEW YORK STATE MUSEUM 



cause when apposed to the tarsus the bend is such as to allow 



the ovipositor to pass easily through a space between the two. 



It is worthy of note in this connection, as showing the method 



of depositing eggs by an insect belonging to the same family, that 



Thalessa has been seen ovipositing in a similar manner by reliable 



observers.^ 



Pupation and final transformations 



The larva of Eremotylus macrurus usually pupates 

 within the cocoon of its victim. As this species preys largely on 

 the saturnians, the larvae of which spin stout cocoons, the grub 

 of the parasite on emerging from the remains of its victim finds 

 itself in a well protected cocoon, and consequently has no need 

 of looking for a more secure place in which to undergo its final 

 transformations. The same habit is probably common to other 

 species infesting hosts spinning a stout cocoon, as, for example, 

 E r e m . a r c t i a e when preying on these moths. The cocoons 

 of Eniscopilus purgatus are found in the soil or 

 under shelter near where its host has transformed. From the 

 lack of evidence to the contrary, it may be presumed that such 

 is the general habit of all the species infesting larvae that do not 

 spin stout cocoons before pupation. 



Very few notes exist on the duration of the pupa state in this 



genus. Riley states that the imagos of Erem. macrurus 



commonly emerge in the spring, and rarely come forth in the 



autumn. This would apparently indicate that the normal habit 



of this insect is to pass the winter in the pupal stage. An example 



of Enis. purgatus has been known to pupate July 24, the 



imago emerging Sep. 13. 



Bibliography 



1862 Packard, A. S. Me. Sci. Sur. Rep't, p.20 (Comes to light) 

 1869 Guide Study Ins. p.l95 (Brief notice) 



1863 Norton, Edward. Ent. Soc. Phila. Proc. 1:357-58 (Table of species) 

 1879 Provancher, UAhhe L. Nat. Can. 11:115 (Generic characters), 



p.116-17 (Table of species) 

 1882 Lintner, J. A. Ins. N. Y. 1st Rep't, p.103-10 (Parasitic on N e p h e - 



lodes violans) 

 1893 Ins. N. Y. 8th Rep't, p.238 (Mention) 



^1888 Lintner. Ins. N. Y. 4th Rep't, p.40-41. 



