8 Journal New York Entomological Society. tVoi. xxviii. 



The holotype male has the wings very much darker brown than 

 in the female, the costal margin being especially suffused; in addi- 

 tion, the venational details are somewhat different, r being placed 

 before one third the length of R^^; R^ considerably longer, slightly 

 more than one half the length of R^; basal deflection of Cii^ some 

 distance beyond the fork of M. With the exception of these rather 

 conspicuous alar differences, the two flies are very similar to one 

 another and until further material becomes available they must be 

 considered as representing a single variable species. 



Genus Erioptera Meigen. 



Erioptera {Erioptera) micromyia new species. 



Size very small (wing of 5 under 3 mm.) ; general coloration pale brown, 

 the thoracic dorsum unstriped ; wings grayish ; ovipositor very long and slender. 



Female. — Length, 3.3 mm. ; wing, 2.8-2.9 mm. 



Rostrum yellowish brown ; palpi dark brown. Antennae moderately long 

 and slender, brown. Head light brown, sparsely gray pruinose. 



Mesonotum light brown, the prsescutum without stripes ; tuberculate pits 

 black, separated by a distance about equal to one and one half times the diam- 

 eter of one. Pleura light brown, heavily light gray pruinose. Halteres with 

 the knobs large, dark brown, the base of the stems pale. Legs with the coxae 

 small, pale testaceous, sparsely gray pruinose ; trochanters testaceous ; re- 

 mainder of the legs brown. Wings grayish subhyaline ; veins dark brown. 

 Venation : As in the subgenus Erioptera ; 26. anal vein moderately sinuate on 

 its outer third. 



Abdomen with the tergites dark brown ; sternites more yellowish. Ovi- 

 positor with the valves very long and slender, acicular, gently upcurved ; 

 sternal valves similar in appearance to the tergal valves but more elongate, 

 ending but a short distance before the tips of the tergal valves. 



Habitat. — Brazil. 



Holotype, 5, Prata, Para, June 30, 1919 (H. S. Parish).' 



Paratopotypes, 2 J's. 



Genus Ozodicera Macquart. 

 Ozodicera attenuata new species. 



Antennal segments four to nine with a single short pectination; segments 

 ten to thirteen very long and attenuated ; dorsum of the prascutum with four 

 brown stripes ; lateral margins of the abdominal tergites brown. 



Male. — Length, about 20 mm.; wing, 16.5 mm. 



Frontal prolongation of the head reddish, shiny, narrowly darker dorso- 

 mcdially ; nasus short ; palpi black. Antennae rather long for this genus of 



