ART. 21 ACALYPTRATE FLIES MALLOCH 33 



LEUCOPHENGA FRONTALIS (WUliston) 



This species has the wings without distinct dark markings, only 

 the apex of first vein being blackish. 



I consider that ornativentns Kahl is a synonym. 



Localitij. — Higuito, San Mateo, Costa Rica (P. Schild.) 



Hendel has erected the genus Oxyleucophenga for the reception 

 of one South American species, imdulata Hendel. The only dis- 

 tinction between this genus and Leucophenga is that the wings are 

 more pointed in the former. If the genus is to be maintained then 

 acioHpennl'i above described belongs to it, but I am of the opinion 

 that the genus is invalid, there being all degrees of variation in 

 the acuteness of the wings. I place Oxyleucophenga as a synonym 

 of Leucophenga. 



CLASTOPTEROMYIA MACULIPENNIS, new species 



Female. — Head testeceous, shining, frons above and upper occiput 

 darkened, ocellar spot blackish. Thorax brownish testaceous, shin- 

 ing, abdomen similarly colored, but darker. Legs stramineous. 

 AVings fuscous, with the following hyaline marks: a transverse 

 band close to base, a transverse mark about its own width beyond 

 apex of first vein, which extends from costa to fifth vein, reaching 

 the latter about as far from apex of discal as length of outer cross 

 vein, a similar spot across middle of cell behind fifth vein, one across 

 middle of second posterior cell, and one extending across wing from 

 apex of second vein to fourth vein near middle of its apical section. 



Ocellar bristles long; lower reclinate bristle microscopic; face not 

 carinate; cheek linear; one vibrissa on each side. Both pairs of 

 dorsocentrals distinct; prescutellar acrostichals absent; scutellum 

 convex, bristles subsequal. First costal division a little over one- 

 fourth as long as second, the latter not 1.5 as long as third; veins 

 3 and 4 divergent at apices, section of costa between their apices 

 fully half as long as the one before it; last section of fourth vein 

 not twice as long as penultimate section; outer cross vein at about 

 its own length from apex of fifth vein. 



Length, 1.75-2 mm. 



Type. — And one paratype, Higuito, San Mateo, Costa Rica 

 (P. Schild). Cat. No. 28472, U.S.N.M. 



This is the only species of the genus known to me which has the 

 wings with conspicuous spots. 



Drosophila superha Sturtevant I consider belongs to this genus, 

 and is distinguished from the above species in having only three 

 hyaline marks on the wing, and but one pair of distinct dorsocentral 

 bristles. 



