AET. 21 ACALYPTRATE FLIES— MALLOCH 15 



wing markings are somewhat similar to those of octovittata Willis- 

 ton, but the thorax is devoid of vittae and the cej^halic and abdominal 

 markings are different. 



MINETTIA TINCTINERVIS, new species 



Fennale. — Clay yellow, shining. Head opaque, face slightly shin- 

 ing, frons and face with slight white dusting; antennae and palpi 

 yellow. Thorax not vittate ; scutellum with a pair of deep black spots 

 at apex. Abdominal tergites each with a narrow, centrally inter- 

 rupted, black fascia on hind margin, broadest on sixth where it forms 

 a large spot on each side. Legs yellow, apices of hind tibiae browned. 

 Wings grayish hyaline, narrowly dark brown along costa from apex 

 of auxiliary vein to apex of fourth, more broadly so on both cross 

 veins, narrowl}^ so on third and fourth veins from inner cross vein 

 to apices, and on fifth vein from near base to apex. Halteres j'^ellow. 



Frontal bristles rubbed off in type, but the ocellar pair apparently 

 small, postverticals situated well below edge of vertex, separated by 

 about as great a distance as they are from ocelli; orbits poorly dif- 

 ferentiated, anterior bristle rather far from eye; arista short pubes- 

 cent ; face flat ; eye higher than long ; cheek not as high as width of 

 third antennal segment; lower margin of occiput with two strong 

 bi'istles on each side. Thoracic bristling as in evittata^ but without 

 the bristle between the intra-aiar and supra-alar bristles, and the 

 anterior sternopleural is very small; scutellum broader than long, 

 apex almost transverse, disk flattened; propleural bristle minute. 

 Fore femur without antero ventral comb ; hind femur without distinct 

 antero ventral bristles. Wings rather narroAv; last section of fourth 

 vein slightly bent forward at apex, not over 1.5 as long as preceding 

 section ; inner cross vein at two fifths from apex of discal cell ; outer 

 cross vein at about half its own length from apex of fifth vein. 



Length, 7 mm. 



Tyjye. — Higuito, San Mateo, Costa Kico (P. Schild.) Cat. No. 

 28449, U.S.N.M, 



Distinguished from the other species with bipunctate scutellum by 

 the almost bare arista, unspotted face, and narrowly clouded wing 

 veins. 



MINETTIA FUSCINERVIS, new species 



Female. — Similar to frnetinerrh, differing in having the scutellum 

 without apical black spots, the tergal marks broader and more pro- 

 duced at their inner extremities, where they project forward angu- 

 larly, the fifth tergitc with the marks fused in center, forming a large 

 triangular central spot, and not two lateral spots. 



