486 
[March 
seqiiently, as they lay in the gall unobserved till the following winter, 
I can say nothing as to the natural time for their appearance. But we 
learn from Mr. Bassett that his specimens came out “ about the 10th 
of July,'’ and Dr. Harris gives June as the month when the trans¬ 
formations of this insect are completed. 
There can be no possible mistake as to the correlation of the S with 
the 9 , as my galls were all gathered off the same tree and the insects 
were all taken out of the gall itself. Mr. Bassett who has favored 
me with specimens of his G. q. singularis % and 9 , thought it possible 
that the S might belong to the inquilinous genus Aulax; but the % 
neuration is not inquilinous and is exactly identical with that of spon- 
gifica and inanis and also with that of the 9 • Hr. Fitch’s 9 ? which 
he refers to nuhilipennis Harris, is much larger, (.20 inch instead of 
.14—.16 inch Walsh, and .15 inch Bassett). It also has the abdomen 
‘‘black” instead of “ piceous red” Walsh, or “ red or dull brick-red” 
Bassett. Finally, it was found “ among fallen oak-leaves early in April,” 
instead of occurring in June (Harris) or early in July (Bassett). In 
all these three characters it differs from Mr. Bassett’s and my 9 9 ’ 
precisely as the dimorphous form aciculata^ which appears in October 
and the following April, differs from spongifica^ which appears in June. 
It is therefore not improbable that we have here another species with 
dimorphous 9 9 , and a species too which many authors, on account of 
the extraordinary 16-jointed antennae of the % , would be inclined to 
make the type of a new genus. No other described species of Psenides, 
so far as known to me, has 16-jointed % antennae. It would be inter¬ 
esting to know whether the abdomen of Dr. Fitch’s April 9 differs in 
its shape from that of the June and July 9 , as that of aciculata differs 
from that of spongljica. My 9 9 nuhlllpeniiis have the abdomen shaped 
nearly as in spongifica 9 , except that the terminal segments happen 
to be more retracted. Both sexes of this species are readily distin¬ 
guishable from C. q. globulus by the number of the antennal joints— 
in the former % 16, 9 1^? the latter 'S 15, 9 14. 
It may well admit of a question, whether the very short and indefi¬ 
nite notice of nuhilipennis by Dr. Harris, though perhaps sufficient to 
identify the insect, ought to give his name priority over that of Mr. 
Bassett, who has described both sexes fully and accurately. The law 
of priority has its conveniences, but it has also its injustices. 
