1358 Rocer C. SMITH 
and first eight segments of abdomen having same general pattern; each bearing 
a pair of prominent lateral gray tubercles and a pair of gray dorso-median tuber- 
cles with black tips; ninth segment of abdomen without lateral tubercles; tenth 
segment cylindrical, dark brownish black; each lateral tubercle bearing two 
setae except meso- and metathoracic pairs, which bear three each. Dorsal 
vessel indistinct; general color of dorsum faint pinkish, darker in anterior 
abdominal region due to food taken in. Legs translucent, with dark smoky areas 
on distal ends of femora and proximal halves of tibiae; tips of tarsi black. 
Length of larva, 1.2 mm.; width of head, 0.4 mm.; width at metathorax, 0.36 mm. 
Second-instar larva.—Head with two large converging black spots above; 
jaws dark, tips amber; palpi and jaws with amber tinge. Prothorax with a light 
yellowish central area, on each side of which is a border of dark reddish brown. 
All tubercles very small, inconspicuous, white or light yellowish in color; stalks 
short; setae short. Between prothoracic depressions and extending posteriorly, 
a dark reddish brown area. Meso- and metathoracic tubercles having promi- 
nent yellow areas circling their bases, extending medianly and slightly poste- 
riorly. On each side of the dorsal blood vessel a rather regular pinkish area. 
Abdomen bordered on each side by a white to yellowish white border, which 
increases in width to sixth segment; ninth segment with three dark spots 
above; tenth segment yellowish white. Between yellow side borders of abdomen 
and yellowish borders of dorsal blood vessel, color dark reddish brown. Legs 
very dark, blackened near joints. 
Third-instar larva.—Head pale yellowish gray, with two longitudinal, jet- 
black, converging bars on ‘dorsum, these bars pointed anteriorly and broadest at 
about the middle. First subsegment of prothorax smoky gray in color, crossed 
by two brick-red dorso-median bands which extend back over second subsegment 
and converge between its depressions; lateral tubercles and border of segment 
distinctly yellow. Mesothorax much like prothorax; entire median part a rich, 
velvety, very dark red; lateral tubercles prominent, wholly yellow, bearing from 
ten to fifteen colorless setae; a large yellow spot around base of each tubercle, 
giving segment a prominent yellow border on each side. Metathorax like meso- 
thorax except that the posterior half of the median area is bright reddish while 
the anterior half is dark velvety red. Abdominal segments all of same general 
pattern, dorso-median part bright red, darker red outside this area, and yellow 
border, including lateral tubercles; eight to ten colorless setae from each lateral 
tubercle, and one or two small setae from two pairs of dorsal papillae on 
posterior third of each segment; posterior five or six segments darker red than 
anterior four or five; last segment largely black. Dorsal vessel dark red to 
black; border very light red, gradually increasing in intensity to dark red of 
dorso-median part. Venter gray; tubercles yellowish. Length of larva, 7.1 
mm.; width at metathorax, 2 mm. 
(There is a great variation in the intensity of the reds and yellows of this 
species in the same locality and in different localities, making this the most 
puzzling species yet studied. Some larvae are very light and faded, especially 
near the end of the third instar. In such cases they may show no trace of 
yellow in the borders, this color being replaced by some shade of gray. In 
some specimens the head spots extend in a gentle curve, in others they are 
distinctly angular. The writer has reared some twenty specimens of a species 
thought to be C. harrisii, but the emerging adults were as near rufilabris as 
harrisii. These larvae differed from rufilabris in having the jaws and the legs 
quite black, abdominal tubercles 2 to 4 inclusive marked slightly with reddish. 
and the general body color in some a duller red, and in others, or in different 
