64 Psyche [April 



the deflection of R4+5. Cell 1st M2 elongate, the sides parallel. Mi_)-2 beyond 

 the cross-vein m, short, about equal to the cross-vein r-m. Cui meets M3 at a point, 

 barely obhterating the cross-vein m-cu. Cell Cui broadest basally as in the Tipu- 

 linse, Cu2 being gently situnaed; 2d A rather short. Cells of the wings with 

 sparse hairs, more numerous in the distal portion of the wing. Type and only 

 known species, M. portoricensis, sp. nov. 



This genus is referable to the tribe Dolichopezini. It agrees most closely with 

 Oropeza and Dolichopeza but the antennae, hypopygium and details of venation 

 are quite different from these genera. It agrees to some extent, in the shape of 

 the antennse and the frontal tubercle, with Macromastix O. S., of Australasia and 

 Chile; however it is only distantly related to this genus. 



A Key to the Dolichopezini. 



1. R2 distinct for its entire length; antennse with less than 13 segments; 



Male genitaUa small, simple in structure 2 



R2 obliterated, at least on its terminal section; antennae with 13 seg- 

 ments; Male genitalia complex in structure 4 



2. Antennae long, filiform, or short; R2+3 perpendicular, simulating a 



cross vein; cross- vein m-cu present Megistocera Wiedemann 



(Asia, Africa and America; tropics) 

 Antennae short; R2-1-3 not perpendicular; cross- vein m-cu absent 3 



3. Head closely applied to the pronotum; 2d anal vein rather long 



Tanypremna Osten Sackeni 



(Cent, and South America; tropics) 



Head on a neck-like prolongation of the thorax; 2d anal vein short, rimning 



into the anal angle of the wing Brachypretnna Osten Sacken 



(North and South America) 



4. Rs apparently lacking; if interpreted as being present, its basis much 



farther distad than its tip Scamboneura Osten Sacken 



(East Indies) 

 Rs present, but often short and simulating a cross-vein 5 



5. Cell 1st M2 absent; basal deflection of Cui proximad of the fork of M. 



Dolichopeza Curtis 



(Eur.; N. Am.; Australia) 



Cell 1st M present; basal deflection of Cui distad of the fork of M 6 



6. Antennae of male normal, short, with a few scattered hairs; cross- vein 



m tends to become obliterated; Rg, more elongate. . . Oropeza Needham 



(Eastern U. S.) 

 Antennae of male longer than the body, thickly clothed with long deli- 

 cate hairs; cross- vein m prominent; Rs short, transverse 



Megistomastix, gen. nov. 

 (Greater Antilles) 



* 



^Tanypremna omissinervis de Meijere (New Guinea) would run down to section Aj; it 

 undoubtedly represents a new genus. I have a V from Milne Bay, New Guinea. Tanypremna 

 /osiidosa Skuse (Australia) scarcely seems to be congeneric with the Neotropical forms; these 

 species need further study. 



