1915] Fdt—Nerr South American Gall Midges 153 



Male: Length, 1.5 mm. AntennsE probably one-half longer than the body, 

 sparsely haired, dark straw; at least 11, and probably 16 segments, the fifth with a 

 stem one-half longer than the cylindrical basal enlargement, which latter has a 

 length one-half greater than its diameter, a thick subbasal whorl of short, stout 

 setae and a sparse subapical whorl of long, slender setae; low circumfili occur at 

 the basal third and apically; terminal segment wanting. Palpi; first segment 

 subquadrate, with a length nearly twice its diameter, the second a little longer, more 

 slender, the third about two and one-half times the length of the second, irregular, 

 the fourth one-half longer than the third, more slender. Mesonotum reddish brown. 

 Scutellum and postscutellum yellowish white. Abdomen rather sparsely haired, 

 mostly dark brown dorsally, the pleurae, venter and enlarged genitalia yellowish. 

 Wings hyaline, the two branches of the fifth vein very short and approaching the 

 condition found in Colpodia. Halteres mostly yellowish transparent. Coxae pale 

 yellowish, the legs mostly pale straw; claws stout, evenly curved, unidentate, the 

 pulvilli about two-thirds the length of the claws. Genitalia; basal clasp segment 

 rather short, broadly and triangularly oval; terminal clasp segment moderately 

 long, somewhat swollen near the middle and tapering to a roundly toothed apex; 

 dorsal plate moderately long, narrowly divided, the lobes moderately broad and 

 broadly rounded; ventral plate long, deeply and triangularly emarginate, the broad 

 lobes broadly rounded and sparsely setose apically. 



Type: Cecid. 1603. 



Johnsonomyia braziliensis sp. no v. 



This midge is allied to the Guatemalan /. cincta Felt, from which 

 it is easily separated by its smaller size, differences in coloration 

 and in the structure of the palpi and ovipositor. The specimen 

 is labeled Igarape-Assu, State of Para, Brazil, February 4, 1912, 

 and is a part of the Cornell University collections. 



Female: Length, 4 mm. Antennae as long as the body, thickly haired, yellowish 

 transparent; at least 15, and probably 16 segments, the fifth with a stem nearly 

 equal to the thickly haired, cylindric basal enlargement, which latter has a length 

 about twice its diameter and a distinct constriction near the basal third; terminal 

 segment missing. Palpi; first segment with a length about four times its diameter, 

 the second a little longer, slightly thicker, the third a little shorter and more slender 

 than the second, the fourth one-fourth longer than the third, more slender, all thickly 

 haired. Eyes black, holoptic. Mesonotum mostly yellowish transparent, Avith 

 variable light fuscous markings. Scutellum and postscutellum light fuscous yel- 

 lowish. Abdomen sparsely clothed with long, whitish hairs, mostly yellowish 

 orange, the dorsum of the third to the seventh segments brownish, the ovipositor 

 pale yellowish. Wings subhyaline with an ill-defined, irregular, fuscous shade 

 resting basally upon the crossvein and extending as a faint, oblique band across 

 the wing, the distal half of the simple fifth vein being distinctly shaded; subcosta 

 unites with the margin near the distal third, the third vein well beyond the apex 

 and the fifth near the basal third; halteres yellowish transparent. Coxae fuscous 

 yellowish, the legs thickly haired, mostly whitish transparent, except that there is 



