608 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
iiMiit, high 00 the .side, a dead black tuhercle, a little raised and rounded in yellow 
i:nu r : Bpiraoloa in '"lack ovals ; rarfaoe covered with a fine short down; head obovoid, 
■,'i'i'fii, BDlOOtb, sparsely pilose; the ocelli brown. Occasionally the larva- in later 
! are differently colored. one had the dorsum dark green, edged on either side 
1>> a gray Line, and BUOeessivelj l>y a hand of yellow, a gray line, and a black band; 
the third segment is wholly and the fifth partly black. Two othersof the same brood 
were green with a black band along base of body and black patches on 3 and 11. 
('Itri/suli.i. — Length, .5 inch; helmet-shaped; compressed laterally, the abdomen 
gomewhal oarinated; mesonotom high rounded, sloping abruptly to top of hoad 
oasOj mnoh compressed and sharply oarinated; followed by a deep excavation ; bead' 
oase not prominent, square or nearly so at top, a little excavated, the corners sub- 
pyramidal and scarcely at all produced ; along carina of abdomen a yellow line 
which forks and passes round niesonotum to top of head-CMC ; a slight yellow lateral 
line on abdomen ; color green, either deep or with a blue or yellow tint ; the abdo- 
men much sprinkled with pale yellow flat points or small spots, a few of these about 
the head-case. Duration of this stage five days in July, seven days in August. 
Mr. Edwards is of the opinion that there are several successive gen- 
erations, u probably four, that the latter butterflies hibernate, and the 
survivors are on the wing early in May, and probably in favorable sea- 
sons in April. The first generation in descent from the hibernating 
females a*e on the wing in June, the second generation in July, the 
third in August, and late butterflies emerge from chrysalis in Septem- 
ber, and these would be of the fourth generation in descent from the 
hibernating females." 
5. The Hackberry Dagger. 
(Jcronycta rubricoma Guen.) 
Order Lepidoptera ; family Noctuida:. 
This is a widely distributed species and doubtless coincident with its 
food-plant, the different species of Celtis, on which, according to my 
own observations as well as those of others (French, 6th Kept. 111. 
State Norm. Univ., p. 45, and J. Marten, Trans. Dept. Agr., 111., Vol. 18, 
Append., p. 132), it feeds exclusively. It will, in fact, perish rather than 
partake of any other food that I have so far offered. The species has 
been represented in the U. S. National Museum from the following 
States : Texas, Missouri, Illinois, South Carolina, Virginia, and eveu 
from Canada, in all of which localities it is probably double-brooded. 
In its southern range the first brood of larva? appear during the early 
part of May, being full grown by about the end of June. The moths 
from these appear during July and the early part of August, whilst the 
larvaB of the second brood are full grown from the middle of September 
to the middle of October, this last brood being, however, very generally 
parasitized. The second generation of moths (with the exception of a 
few premature specimens which issue the same fall) makes its appear- 
ance the ensuing spring from about the 10th of April till May. Capt- 
ured specimens in the National collection bear the following dates: 
By myself, April 20, 1874, July 10, 1874, and September 3, 1874; by 
Belfrage, Texas, April 11, 21, 29; by S. H. Saunders, Canada, July 10, 
1886. The full-grown larva? are rather handsome insects, which, like 
