894 REPORT OF THE HARVARD AFRICAN EXPEDITION 
black, partly covered with yellow pollinosity which forms two distinct longitudinal 
stripes over the middle of the dorsum. Ocellar and basal calli of the frons distinct, 
shiny, black; facial callosities pale brown, darker on the sides. Antennae, legs, and 
abdomen mostly orange-rufous; the abdomen above with two dark brown to black 
longitudinal stripes beginning on the first tergite and extending to the third or fourth. 
Infuscation of apical half of wing gradually fading from the discal cell to the hind 
inarem. beneth: 7 to: Olmimis.. i. 02.5 a <a ee ee C, neave. 
Antennae very long and slender, at least as long as the dorsum of the thorax plus the 
scutellum; first segment thinner than the second. Fore tibiae swollen. Ocellar 
callus iot ratsed mot SITY. yo. <binlss, chncks 3 emg oe > eno eee eee ke eres aie ee en 3. 
3. Apical half of the wing fairly uniformly infuscated from the tips of the basal cells on; a 
lighter streak in the first submarginal cell (between the stigma and the fork of the 
third vein) and in the fifth posterior cell. Abdomen dorsally mostly blackish-brown, 
with a broad median, and narrower lateral, pale yellowish stripes over the second to 
fourth tergites, the first tergite with dark apical margin, narrowed in the middle; 
ventrally mostly pale yellowish, with a median blackish stripe which widens poster1- 
orly. Legs, palpi, and basal segments of antennae reddish yellow. Length, 11 to 
DAU Be he ot ss sup eed, 22 awed re ee ee ae eee Caomigie 
Infuscated apical half of the wing distinctly darker at the apices of the basal cells and the 
base of the discal cell, beyond which it is more or less tinged with yellow. Brownish 
black dorsal stripes of the abdomen narrower and shorter; the hind margin of the 
first terevte not broadly blackish: Snaaller; 8.5 to fmm... 04-2 soe eee 4, 
4. Blackish dorsal abdominal stripes rather wide and straight, more or less connected with 
the brown or blackish hind segments; venter with a more or less distinct brownish 
black, median stripe which widens posteriorly. Dark apical half of wing but faintly 
yellowish =acrossathe: discal Gell... hs oaks cate Sa eke oo) ee ee C. dimidiata. 
Blackish dorsal abdominal stripe short and narrow, rarely reaching beyond the base of the 
third tergite, often faint or reduced to indistinct spots; venter almost entirely reddish 
yellow. Dark apical half of wing with a distinctly paler and strongly yellowish area 
extending from the stigma to the base of the fourth posterior cell.......... C. silacea. 
5. Antennae short, at most as long as the thorax; the first segment more or less swollen 
and thicker than the second when seen from above; the second shorter than the first. 
Body shorts thickset,, . Pade aot snoutzlike, aoc: -Se.cy ca cee meses Ae ee ioe 6. 
Antennae slender and elongate, longer than the thorax; the first segment slender, not 
thicker than the second which is at least as long as the first. Body more or less 
Glomeate. sMAGe PANO UU-TIKG :, «0% ia mnrusce me: peal se eree sas SHO es 8. 
6. Female: Frons about twice as wide as long, with a large, halfmoon-shaped, shiny black 
basal callus and two smaller, shiny black calli on the vertex (on either side of the 
ocelli). Face uniformly pollinose without callosities. Head, antennae, thorax, and 
legs brownish black to black; dorsum of thorax not striped; abdomen tawny red. 
First antennal segment strongly swollen, about one and one-half times the length of 
the second. Median cross-band of wing reaching the hind margin; the apical spot 
narrow and of uniform width, very narrowly connected with the median band along 
the costa; upper branch of the third longitudinal vein longer than the basal stalk. 
Male: similar in color, but densely covered with long, snow-white hairs; eyes barely 
touching each other in one spot beneath the ocelli. Length, 7 to8mm.... C. laniger. 
Frons of female much narrower, hardly wider than long; no shiny calli on the sides of the 
vertex. Abdomen mostly black. First segment of antennae slightly swollen. Upper 
branch of third longitudinal vein shorter than the basal stalk.................... 
7. Female: Mostly black; first antennal segment, palpi, legs, apex of scutellum, and small 
spots on the sides of the first two abdominal tergites, tawny reddish. Face with 
two narrow, pale, shiny, median callosities converging toward the mouth and with a 
small, shiny black spot on each side close to the lower edge of the eye. Dorsum of 
thorax with distinct, continuous, longitudinal stripes of pale pollinosity; abdominal 
tergites with grayish pollinose hind margins which widen on the middle line into small 
triangles. Second antennal segment but little shorter than the first. Median cross- 
band of wing not reaching the hind margin, its outer border wavy; the apical spot 
irregularly divided. Male: On the whole darker than the female, without stripes on 
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