OF WASHINGTON. 87 
ifornia, last April. One of them had been found December, 1885, by Mr. 
A. Koebele, who had kept it in a jar of earth with dead leaves. It died while 
I was there, in April, 1887, having remained motionless and without food 
for nearly fifteen months. The second was in Mr. Rivers's possession and 
had shed its larval skin on April 2, 1887. This Mr. Rivers kindly gave 
me, and it shed its skin again April 18, and it is more particularly to this 
brief period of about two weeks that I wish to call attention because it rep- 
resents a stage of development hitherto insufficiently characterized, and 
which may be likened to the pupa state. It is in reality a pseudo-pupal 
condition, the insect being neither larva nor imago During this brief 
period the color is pale, there is no disposition to move, and the mouth- 
parts are more soft and undeveloped; the joints of antennae and palpi are 
less distinctly formed and shorter, while the jaws proper are reduced to 
little more than useless tubercles. The perfect, larviform female, after 
shedding this pseudo-pupal skin (which differs from the other shed skins 
in being pale and more delicate), becomes darker again and in general ap- 
pearance much more like the full grown larva before it entered the pseudo- 
pupal condition. The color in the adult is uniformly dark brown above 
and much darker beneath than in the larva. In short, the perfect female 
is more strongly chitinized throughout, while the mouth parts are also 
darker and stronger, with more bristles, and the mandibles more distinctly 
elbowed and longer. The third specimen was given to me by Mrs. A. E. 
Bush, of San Jose, and. though not fully grown, died and became shrunken 
and rigid within a week in the box of dry earth in which I carried it while 
travelling. 
The second specimen, from Mr. Rivers, was placed in a large jar with 
earth and placed where the male might reach it, and on April 25 had at- 
tracted a male. She subsequently laid eggs. These are spherical, 1.8-2 
mm. in diameter, with occasionally an irregular impression no doubt caused 
by external pressure. Color yellowish-white when fresh, turning grad- 
ually to, dirty yellow. Tolerably shining and with no sculpture visible. 
JULY 7, 1887. 
Seven persons present. President Howard in the chair. 
Dr. Riley exhibited various specimens, and made the following 
remarks upon them : 
NOTES ON THE EVERSIBLE GLANDS IN LARVAE OF ORGYIA AND PAR- 
ORGYIA, WITH NOTES ON THE SYNONYMY OF SPECIES. Dr. A. S Pack- 
ard has called attention (Am. Nat, 1886, page 314) to the fact that the 
two coral-red tubercles on the back of joints 9 and 10 in the larva of Or- 
gyia leucostigma are in reality eversible glands, similar to that previously 
found by Mr. E. R. Poulton (Trans. Ent. Soc., Lond., 1886, page 16) on 
the loth joint of the European Orgyia pudibunda. 
