1913] Alexander — New Neotropical Antockini 47 



notum rather darker yellowish. Pleurae, light yellowish, a dark spot under the base 

 of the halteres, above the hind coxa; a clearer-defined, though smaller, spot on 

 the propleurse in the vicinity of the anterior spiracle; sternum light orange-yellow. 

 Halteres, stem short, knob large; pale yellow. Legs, pale yellow; only the two 

 terminal tarsal segments slightly darker. Fore legs very widely separated from the 

 middle legs as in the Antoehini. Wings: light yellowish; veins brown, those in the 

 costal region rather brighter-colored, stigma very indistinct. Venation: (See fig. 

 c.) : Sc short ending before the fork of Rs; what seems to be a branch of R: +3 arises 

 from Rj+3; I regard it as cross- vein r, although it is not complete and is very oblique 

 in position (such as in Paratropeza). If this is regarded as a vein, R 2 , then the radial 

 cross-vein is absent and the genus would run down into the Eriopterini; I know 

 of no genus, at present, that can receive it. 



Abdomen: light yellow; on the sides of the Gth segment rather dark brown, and 

 here with a conspicuous widened enlargment (possibly not normal). Hypopy- 

 gium: (See fig. k, ka), 8th tergite short, narrower than either the 7th or 9th; 9th (a) 

 tergite -convex on the caudal margin, with a deep median notch. Pleural pieces 

 (b) rather narrow, cylindrical, with the appendages at the end or on the ventral 

 face; the outer angle of the pleura produced into a blunt knob (c); apical append- 

 ages two, the dorsal one (d), fleshy, inserted near the apex of the sclerite; the ventral 

 one (e) arising from the ventral side, far down near the base of the pleura; the base 

 strongly swollen, the tip chitinized bearing on the inner face, a strong tooth, swollen 

 at the base and projecting inward; the tip, slender, bent inward. What seems to 

 be the guard of the penis (f) is elongated, slender, not swollen, but pseudo-seg- 

 mented near the tip. 



Holotype: d\ Igarape-assu, Para, Brazil. Jan. 30, 1912. (H. S. Parish, coll.) 



Type in Cornell University Museum. 



The reference of this curious species to Teucholabis is provis- 

 ional, only. It seems to me as though it might be considered one 

 of the primitive forms of the genus. I take pleasure in naming 

 this insect after its discoverer, Mr. H. S. Parish, the well-known 

 collector and traveller. 



Orimarga Osten Sacken 



The following species is the second American form to be made 

 known. The two species may be separated by the following key. 



1. Thoracic pleurae without silvery band; legs pale yellow; tip of femora, base and 

 tip of tibia black; wings hyaline, extreme base dark yellow. (Southwest. 



U. S.) arizonensis Coquillett 1 



Thoracic pleura? with a broad silvery-blue band; legs dark biown, uniform, wings 

 suffused with darker. (Guatemala, Cent. Am.) argen/eoplcura, sp. n. 



"Coquillett, "New Dipt, from N. Am.;" Proc. U. S. Mus.; vol. 25; no. 1280; p. 83, 84 

 (1902) 



