OULEX EXJMIMETES 239 



Ten specimens, Orizaba, Mexico, bred from larv» found in a puddle of drainage 

 water in the suburbs of the city. (F. Knab.) 



Type.— Cat. No. 11971, U. S. N. M. 



The adult so closely resembles that of C. stigmatosoma Dyar that it is almost im- 

 possible to distinguish them; but the larvse are very dissimilar. 



Description or Femat.k, Male, and Labva of Cui-ex eumimetes : 



Female. — Proboscis moderate, subeylindrical, unifonn, labellse conically 

 tapered ; vestiture black, a rather broad, sharply limited white band at middle ; 

 setse minute, durved, black, those on the labellae more prominently outstanding. 

 Palpi small, one-fourth the length of proboscis, black, with large white tips. 

 Antennae with joints subequal, rugose, pilose, black, the second joint slightly 

 enlarged, with a patch of white scales on inner side; tori subspherieal, with a 

 cup-shaped apical excavation, yellowish, shading to black within, with a patch 

 of white scales on inner side ; hairs of whorls sparse, moderate, black. Clypeus 

 rounded triangular, prominent, dull black, nude. Eyes black. Occiput black, 

 clothed with narrow, curved scales, which are pale brownish, ocular margin and 

 sides white ; many erect serrate-tipped, pale-brownish scales on the nape, those 

 towards the sides black. 



Prothoracic lobes elliptical, remote dorsally, luteous, clothed with white scales 

 in the middle and some dark bristles. Mesonotum brown, clothed with narrow, 

 curved bronzy-brown scales with a brassy luster, those along the margins paler 

 and forming two indistinct spots on the disk; ante-seutellar space surrounded 

 by pale scales and a patch of them at root of wing ; bristles rather numerous, 

 long, black. Scutellum trilobate, brown, clothed with narrow, curved whitish 

 scales, each lobe with a tuft of brown bristles. Postnotum elliptical, prominent, 

 pale brown, nude. Pleurse and coxse pale luteous, with small patches of ellipti- 

 cal, flat white scales and rows of small brown bristles, front coxse with a patch 

 of blackish scales. 



Abdomen subeylindrical, flattened, truncated posteriorly; dorsal vestiture 

 black, a yellowish-white band at base of each segment except the flrst, narrowing 

 at sides, joining a row of white lateral patches; venter white scaled, with a 

 median series of apical, large black patches. 



Wiags ample, hyaline ; petiole of second marginal cell about one-third as long 

 as its cell, that of second posterior cell nearly as long as its ceU; basal cross- 

 vein distant a little more than its own length from anterior cross- vein; scales 

 blackish, the outstanding ones dense, long, linear. Halteres whitish. 



Legs slender, long; femora black, white below nearly to tips, knees white; 

 tibiaa black, with a white line on inner side, extreme base and tip narrowly white ; 

 tarsi black, each joint with a white band at base and tip ; front and mid tarsi 

 with the rings very narrow and present only on first and second joints and base 

 of third. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 4.5 mm. 



Male. — Proboscis straight, slightly longer than in the female. Palpi long 

 and-slender, exceeding the proboscis by nearly the length of the last two joints, 

 last joint pointed, penultimate one slightly enlarged ; vestiture black, the long 

 joint with a pale ring before the middle, the others with narrow, basal white 

 bands ; beneath a line of white scales ; apical half of long joint and last joints 

 with long, dense black hairs. Antennae plumose; last two joints long and 

 slender, rugose, pilose, black, the others short, pale, each with a narrow black 

 ring at insertion of the hair- whorl ; hairs long, fine, brown. Coloration similar 

 to the female. Wings narrower than in the female, the vestiture sparse. Abdo- 

 men long, depressed, nearly parallel-sided, the eighth and ninth segments 

 narrowed; white dorsal bands much broader than in the female; lateral ciliation 

 long and fine, pale yellowish. Claw formula, 1.1-1.1-0.0. 



