318 The Ohio Journal of Science [Vol. XX, No. 8, 



of the abdomen dark brown, abdomen gradually darker posteriorly and 

 quite black at the apex. Face with a distinct shining callus in the 

 middle, front with an elongate shining black callosity. Antenna, first 

 segment black somewhat elongated, second and third segments brown, 

 basal extension of the third segment slender, elongate, somewhat 

 curved and not quite reaching half of the length of the segment. Legs 

 black except that each tibia is white with a very dark apex. Wing dark, 

 nearly black, posteriorly less intensely colored. Figure 3. 



Holotype female from Tukeit, British Guiana, July 17, 1911, 

 and ten paratype females taken between July 16 and August 16, 

 1911, in the same locality, in the American Museum of Natural 

 History. Three paratype females from the same locality taken 

 Jul}" 17, 1911, in my collection. 



This is a peculiarly colored species for a Dichelacera, but it 

 has the proper characters and aside from color, looks like a 

 member of the genus. Its uniform dark color at once dis- 

 tinguishes it from other species with which it is associated. 



Dichelacera ochracea n. sp. 



Length of the female 11 millimeters. General color pale yellowish 

 all over without conspicuous markings of any kind. Front yellowish 

 pollinose, frontal callosity shining brown, nearly square with a short 

 extension above. Face yellow pollinose without denuded central callus, 

 palpi yellow, antenna largely yellow, annulate portion of the third seg- 

 ment dark, nearly black. Thorax pale yellow with much golden pubes- 

 cence, dorsally a uniform band between the attachment of the wings 

 and the scutellum clear brown. Legs pale yellow without distinct 

 markings although the tarsi are a shade darker than the tibia, especially 

 apically. Wing shaded; from some views it appears to be uniform all 

 over but with the insect pinned on a white support or with opaque 

 light the disk of the wing is seen to be less colored than the other parts. 

 Included in the less colored are the second basal and axillary cells, and 

 parts of the marginal, first submarginal, fourth and fifth posterior and 

 all of the discal except its apex. Abdomen dorsally pale yellow and 

 mostly golden haired, bases of the first four segments, especially the 

 third, and all of the last three segments brownish. 



Allotype female from Mallali, British Guiana, April 31, 1907, 

 in the United States National Museum. Paratype female from 

 Port of Spain, Trinidad, in my collection. 



This is a difficult insect to characterize on account of the 

 lack of contrasting colors, but it is very distinct from other 

 species of the genus known to me. 



