PARASITES HIBERNATING IN BROWN-TAIL WEBS. 263 
Oompsilura concinnata Meig. Hibernating larve are occasionally 
found, but apparently do not complete their transformations in the 
spring. 
ees chos pallipes Brischke. Occasionally reared as a parasite 
of Apanteles eco On The Apanteles larva reaches full maturity and 
spins its cocoon, but is overcome before pupating. The Mesochorus 
adult issues from the cocoon a very few days later than would the 
Apanteles had it remained alive. 
Entedon albitarsis Ashm. An internal parasite within the larve of 
Pteromalus egreqvus. 
The appearance of the hibernating larve of the Pteromalus is indi- 
4 ii i\' : 
i \A 
Fic. 60.—Portion of brown-tail moth nests, torn open, showing caterpillars 
attacked by larvee of Pteromalus egregius. Enlarged. (Original.) 
cated fairly well in the accompanying illustration (fig. 60), which 
represents a ‘‘pocket”’ of parasitized caterpillars torn open. Very little 
of interest is associated with the life and feeding habits of these larve. 
The female pierces the host caterpillar with her ovipositor preliminary 
to the deposition of her egg externally, 
and the caterpillar thus stung is fre- 
quently rendered quiescent, and may 
even die before the hatching of the para- VG ee ee SS 
site larve. _ ee eee 
The hibernating larvaof Apantelesis |. ay 
‘ Fig. 61.—Apanteles lacteicolor: Imma 
so small as to be very difficult of detec- ture larva from hibernating caterpillar 
tion until after it has resumed activity 0! th pani ne AO 
in the spring and increased in size. Its oo oe 
exact appearance during the hibernating stage can not be de- 
scribed, because nearly every specimen found has been injured 
more or less in the removal. The accompanying illustration 
(fig. 61) is from’a sketch made by Mr. Timberlake of a half-grown 
larva from life. None of the preserved specimens shows the curious 
projection beneath the anal bladderlike appendage which latter is 
characteristic of the early stage larve of the subfamily to which 
Apanteles belongs. The head and mouthparts are strikingly dis- 
