214 On a new Species </ TabaniJie/rom British Guiana. 



colouring and shape of the other species of the genus as she 

 restricts it. It is much Larger than D. testacea, measuring 

 19 mm. Its wings are smoky and blotched, whereas in 

 D. testacea the wings are hyaline all except three dark spots. 

 The tibia of the fore leg is white, but in D. testacea it is 

 black. The abdomen is dark brown, in D. testacea a rusty 

 brown. 



Dtchelacera rohiginosa, sp. n. 



Head broader than the thorax, front and face orange- 

 yellow. Eyes large, black with a bronze shimmer, bare. 

 Fro!ital callus a narrow stripe, hardly widening at the base. 

 First two joints of the antennfle reddish orange, third joint 

 reddish biown, its spur reaching to the second ainmlatioii 

 and sparsely beset with small bristles on its dorsal surface. 

 First three annulations of the third joint dark brown, fourth 

 almost black. Palps about as lung as antennae, yellow, 

 curved, rather thinly tomentose. Proboscis long, brown, 

 blackish at the tip. 



Thorax and scutellum rusty brown, under surface light 

 brown. 



Legs : all the femora reddish yellow, as also are the tibia 

 and greater part of the first tarsal joint of the second and third 

 legs. Tibia of the first leg whitish in its proximal two- 

 thirds, dark cinnamon-brown in its distal third. All the 

 tarsal segments of the first legs nearly black, the last four 

 tarsal segments of the second and third legs dark brown. 



Wings much clouded, the veins very dark. Costal cell 

 smoky yellow. Between the subcostal and the fifth longi- 

 tudinal veins the wing is blotchy and smoky, but the greater 

 part of the discal and of the fifth posterior cells and a part of 

 the fourth posterior cell are transparent, and the greater part 

 of the second basal as well as a distal patch in tlie marginal 

 and second submarginal cells and two narrow streaks in the 

 first submarginal cell are translucent. The smoky blotches 

 are darkest at the tip of the first longitudinal vein and its 

 neighbourhood, round the anterior cross-vein and its neigh- 

 bourhood, at the bifurcation of the third longitudinal vein, 

 and at the tip of the discal cell. 



Abdomen dark brown, each segment from the second to the 

 fifth inclusive with a well-defined median triangular yellow 

 patch. Under surface light brown. 



The specimen that constitutes the type of this species was 

 sent to the London School of Tropical Medicine by Dr. K. S. 

 AVise, Government Medical Officer, Georgetown, Demerara, 



