18 
space tending to be darker, as also a space each side of the dorsal line: venter pale 
greenish, densely mottled. Dorsal line whitish, as broad as the subdorsal and regu- 
lar, but much fainter; subdorsal line mottled with pinkish, straight. The pale rnot- 
tlings of the body are heavier between tubercles i and ii and across tubercle iii, sug- 
gesting obsolete lines. Slight black streaks bordering the subdorsal line below. 
Substigmatal band broad, sharp, the- edges a little irregular, white, filled in with pale 
red rnottlings. Feet all dusky: cervical shield black, very narrowly cut by white 
dorsal and subdorsal lines; anal plate dusky, cut by pale dorsal line, with a constric- 
tion anteriorly. Tubercles cornified, distinct, dark brown, largest on joints 12 and 
13: tubercle iv on joint 5 is opposite the upper corner of the spiracle, on joints 6 and 
7 below the middle, on 8 at the middle, on 9 above the middle, on 10 at the upper 
corner, on 11 low down halfway between the spiracle and tubercle v, and on joint 12 
opposite the lower corner of the spiracle. Setae short, rather stiff, dark. 
DISTRIBUTION OF THE SPECIES. 
The distribution credited by Dr. Smith (Bui. 44 U. S. Xat. Mus., 
p. 168). taken tog-ether with divisional records of occurrence, shows 
that this insect is generally distributed from Canada and Maine south 
to Florida and the other Gulf States, and west to Colorado and Mon- 
tana. It is known also in Jamaica, Brazil, and Cuba. 
Judging by the locality list cited above, which was published in 
1893. it would seem probable also that the insect has widened its nat- 
ural range since that time, as it was stated to occur westward only as 
far as Kansas and Nebraska, and Maine was not included among the 
northern localities. It was troublesome about Chicago. 111. . for the 
lirst time in 1899, and recently has been reported by different entomol- 
ogists from several northern regions. These include Kittery and 
Orono. Me. (reported, respectively, by Messrs. Thaxter and Slinger- 
land). and St. Anthony Park. Minn. (Lugger). The most western 
locality in Montana is Miles (Davis), and in Colorado. Fort Collins 
(Gillette). The most northern locality in New York State is Number 
Four (Lintnei). 
This insect is undoubtedly native to North America as well as South 
America and indigenous to the United States. Its occurrence in 
Brazil and in Central America and its greater abundance in semitrop- 
ical portions of the United States would indicate that it was originally, 
although not in very recent times, a tropical species. At present it is 
more at home in the Southern States, in the Lower Austral zone, where 
unusual opportunities are afforded for its increase in swamp land, 
among wild rice and rank grasses, but it is also thoroughly acclimatized 
nearly throughout the Carolinian portion of the Upper Austral zone, 
and appears to be gradually working its way northward, the extreme 
northern localities mentioned being located well within what is consid- 
ered the Transition zone. 1 It is evidently destined to further invade 
x The mere record of the capture of this insect in the most northern localities noted 
can scarcely, in the writer's opinion, be taken as positive evidence of its establish- 
ment there. It would seem more plausible that the insect had not bred in such 
