76 MR. NEWPORT ON THE ANATOMY AND DEVELOPMENT 
will soon enter the earth, which it does, as I presume must have been the case with these 
insects, while the parasites are very young and small, otherwise they may be injured or 
detached while the caterpillar is burrowing and making its cell. The fated insect, ex- 
hausted by the parasites, has but sufficient strength to complete and tapestry its earthen 
chamber before it dies, leaving its newly-formed abode to the occupation of its enemies, 
which grow rapidly, as we have seen, pass through the changes I have traced, and then 
form their own cocoon in which they are metamorphosed to nymphs. 
On examining one or two of the cylinders at the time of obtaining them in the begin- 
ning of April, I found that the inmates had very recently changed to nymphs (fig. 18). 
On the 8th of May one of these assumed the imago state (fig. 19), but escaped on my 
incautiously opening the box that inclosed them. On the 14th two more appeared, and I | 
now had the means of identifying the species. It proved to be as I have stated, Paniseus 
virgatus. 
It is probable that these insects may have come forth at a period earlier than in their 
natural haunts, having been kept in a warm room, and the temperature of the season, at 
the time of their evolution, being considerably higher than usual. It is worthy of remark, 
however, that the moth, or the larva of which this Paniseus is a parasite, kept during its 
pupa state under precisely similar cireumstances, had already made its appearance a week 
at least previously; so that, under similar conditions of locality and temperature, the 
parasites came forth at the latest period. 
