Packard.] 
90 
[May 7, 
ments, both in the freshly hatched and in the later stages of the 
larva. I have also observed them in the freshly hatched living 
larvae where they are white. 
It is also interesting to note that similar glands are present, and 
with similar position, in alcoholic larvae of Laria rossii , brought from 
Polaris Bay, northern Greenland, by the late Dr. Bessels. I have 
also observed them in alcoholic examples of the European Orgyia 
ericce , 0. anti qua , Dasycliira fascelina, and in D.pudibunda, in which 
however only one (on segment 7) could be detected, also Ocneria 
dispar and Liparis auriflua. Hence it would appear that in the 
group Liparidae, these dorsal abdominal glands are generally pres- 
ent. I' find after writing this that Mr. Ponlton 1 states that these 
glands occur in the Liparidae generally, as he found them in several 
East Indian genera, but could not detect them in the European 
Demas. 
III. THE LATERAL EVERSIBLE ABDOMINAL GLANDS OF CERTAIN HEM- 
ILEUC INI (HYPERCHIKIA IO, ETC.) 
Eversible glands of Hypevchiria io. — In an interesting article on 
“organs, probably defensive in function, in the larva of Hypevchiria 
varia Walk., “published in Psyche (iii, 98, June, 1882,) Dr. G. Dim- 
mock called attention to certain lateral glands in this caterpillar, 
which had previously been overlooked. They occur on each side 
of the first and seventh abdominal segments “a trifle below the level 
of the stigmata.” As he observed it in the living larva, I quote 
his description in part. 
“These organs, when retracted, exhibit nothing more than an ir- 
regular opening, about half a millimetre in diameter, situated in 
the reddish lateral line which extends from the anterior part of the 
fourth segment to the posterior extremity of the larva. If the 
larva be disturbed by slightly touching the spines with which it is 
covered, and at the same time attention be given to the above men- 
tioned irregular openings, which should be observed under a lens, 
each opening will be s§en to evaginate and to re-invaginate alter- 
nately. When evaginated to about half a millimetre in height 
above the surrounding skin the appearance of the organ is very 
similar to that of a minute sea-anemone or actinia with its tenta- 
cles retracted, and this resemblance is enhanced by the flesh-like 
aspect of the whole extended portion of the organ, its color being 
1 Trans. Ent.Soc. London, 1887, 300. 
