1863.] 
263 
ill the dried specimen, there appear to me to exist two pair of very 
short, robust appendages similarly situated to those of Corydalis, the 
superior pair slightly incurved and prehensile in S and simple in 9 , 
and the inferiors simple 9 . In Corydalis both pairs of appendages 
are long and strongly forcipate in % and short and simple in 9 . 
JVofe 27, p. 181. Chauliodes rastricornis Ramb. I have bred 
many specimens of this insect from the larva, which occurs under the 
loose bark of floating logs, apparently beneath the surface of the water, 
and retires under logs &c., on the dry land to assume the pupa state, 
forming a rude cell there as does Corydalis cornutits L. Sometimes 
on floating log-rafts it forms its cell under that portion of the bark 
which is permanently above water. The pupa is quiescent, but has 
the power, when disturbed, of crawling along quite fast on its belly. 
It lies in the pupa state about 3 weeks, and my first imago appeared 
May 28. 
The larva is of a pale dingy brown color, and has the general ap¬ 
pearance of that of Corydalis cornutus^ but is much smaller measuring 
only 40—45 mill., exclusive of the abdominal appendages. The Head 
is subquadrate, not wider than the prothorax and with no neck such as 
that of Corydalis, piceous, glossy and with a few scattered punctures. 
The mouth scarcely difiers from that of Corydalis^ except that the epi- 
stoma and labrum are larger and the latter proportionally much wider, 
and except also that the mentum is longer and its emargination is trun- 
cate-obtrigonate, instead of describing a circular arc of 90°. Precisely 
as in Corydalis, the maxilla is elongate, depressed, four times as long as 
wide and with its sides parallel, and as in Corydalis, it is remarkable 
for being furnished at its tip with two palpiform appendages, the outer 
one a little the longer of the two and nearly as long as the maxilla is 
wide. The outer one or true palpus, is more robust than the other, 4- 
jointed, the last joint very minute; the inner one, (the homologue of 
the Orthopterous galea and of the palpiform outer maxillary lobe in 
the Coleopterous Adephaga,) is distinctly 2-jointed, the basal joint the 
stoutest and the two of equal length. Although in Corydalis the eyes 
are lateral, 6 in number, simple of course, and very distinct, yet in 
Chauliodes they are scarcely perceptible and cannot be counted. The 
antennae are about 2 mill, long, 5-jointed, the joints each slenderer than 
the preceding one and proportioned to each other as follows:—1, 3, ], 
