484 R. OSTEN SACKEN 



X>iplocli.O]:*d.a<9 nov. gen. 



Elaphomyia hrevkorniSj, ^ and 9 , described by M/ Saun- 

 ders in the Trans. Ent. Soc. N. S. V, 415, Tab. 13, f. 2 and 

 3, represents, 1 am convinced, two distinct species. The subject 

 of fig. 3 was erroneously taken for the female ; the specimen 

 is a male and a different species. If it had been a female, it 

 would have had a long ovipositor, like the other females of 

 Elaphomyia (Syn. Phytalmia Gerst.) and it would not have the 

 large expansion of the costal margin that, as I learn from spe- 

 cimens in my possession, only belongs to the males. I have be- 

 fore me a male specimen from New Guinea , which answers 

 exactly fig. 3 and the description belonging thereto. This same 

 species was described by M." Walker as Dacus turgidus and I 

 therefore adopt this name for it. 1 have moreover , from the 

 same country, two females, belonging to the same genus, but 

 to two different, and apparently new , species. For these three 

 species, together with the original Elaphom. hrevicornis Saund. 

 (1. c. fig. 2) , as a fourth, I propose the establishment of the 

 new genus Diplochorda, the name of which is derived from its 

 most striking character, the close approximation of the first 

 and second longitudinal veins. 



The venation alone is sufficient to characterize it. Its pecu- 

 liarity consists especially in the coarctation of the marginal and 

 submarginai cells, and a corresponding expansion of the costal, 

 first basal and discal. This character exists in both sexes, but is 

 particularly striking in the male. In D. turgida J^ (the only 

 male I have), the costa is very stout and is bent almost at an 

 angle (see 1. c. fig. 3) ; the auxiliary vein is short, and reaches 

 very little beyond the tip of the anal cell ; the first longitudinal 

 vein is unusually stout, like a costa, and ends not very far 

 from the apex of the wing ; the costal cell is very broad (at 

 its broadest place it is but httle narrower than the length of 

 the anterior crossvein) ; the second vein runs so close alongside 

 the first, that the marginal cell becomes linear , some attention 



