39 
The larva.—The few specimens of the larva available for description 
are small or not quite mature, the longest measuring less than an inch 
and one-fourth, and with much narrower head than that of the fall army 
worm. The ground color in life is greenish or olivaceous, but this 
does not show in inflated and alcoholic specimens. The lateral stripe, 
however, is strongly suggestive of frugiperda, although the surface is 
not marked by the large tubercles present in the latter species. The 
head is mottled dark brown, with V-mark well indicated; the thoracic 
plate scarcely different from the abdominal seg- 
ments save in bearing piliferous warts, while the 
remainder of the body, with the exception of the 
head, which is strongly marked with dark brown 
undulating lines, is faintly clothed, only a few . 
4 Zz i Fic. 9.—Laphygma exigua: 
extremely short hairsappearingatintervals. Below enlarged section of first 
the lateral stripe the surface near the spiracles is —_Preleé_ segment, dorsal 
: . 6 : view (original). 
pinkish. The larva is shown, lateral view, at 4, and 
dorsal view at c, figure 8; an enlarged section of the first proleg 
seoment of the larva is illustrated in'figure 9. 
Through the kindness of Messrs. Coquillett and Dyar, the follow- 
ing more technical descriptions of the larva are furnished: 
The young larva.—The young ones are pale green with a whitish dorsal, subdorsal, 
and stigmatal line, spiracles white, ringed with black, the head dark brown. Later 
in life the head becomes green dotted with blackish and the coloring of the body 
differs considerably in the depth of the coloring even among the different individuals 
of the same brood and in the same stage of development. In some the ground color 
is light green, in others the suprastigmal space varies from dark green to almost 
black. 
When first hatched the larvee spin a web about them and live gregariously for 
several days, after which they disperse and live separately without any protection. 
[D. W. Coquillett. ] 
The mature larva.—Head round, oblique, apex in joint 2; sordid luteous with a 
few white flecks on the vertices of the lobes; width about 2™. Body cylindrical, 
equal, normal, joint 12 scarcely enlarged. Cervical shield smoky or green, cut by 
three sordid white lines. Green or olivaceous in darker larvee. A straight subdorsal 
line a shade paler than the ground color, and a straight broad substigmatal one of the 
same color but broadly green, filled so as to appear only at the edges, or else in 
the dark form, blotched in dull red centrally on the segments. Between these lines 
the lateral space is gray to black, strongly dotted with whitish. Dorsum dotted 
and lined confusedly in green or blackish, heaviest centrally, defining a narrow 
obscure pale dorsal line. A bright white speck on tubercle iv, which is at the upper 
corner of the spiracle. Subventral region pale, mottled in whitish. Feet normal, 
green, the thoracic ones brown shaded. [H. G. Dyar.] 
THE QUESTION OF NOMENCLATURE. 
Considering the cosmopolitan distribution of this species, the question of nomen- 
clature becomes important. In Smith’s list of Lepidoptera of Boreal America pub- 
lished in 1891 (p. 47) the insect is recorded as Caradrina flavimaculata Hary. In its 
larval as well as adult stage, and in its habits, however, it bears so close a resem- 
blance to the fall army worm (Laphygma frugiperda) that it is obvious that the 
