1913] Alexander — New Neotropical Antochini 53 



Head: rostrum dark brown; antenna? uniform dark brown. Front, vertex and 

 occiput light grey, suffused with brown. 



Thorax: prsescutum rich light brown without apparent paler stripes; sides of the 

 sclerite broadly pale buff; scutum similar, brown; scutellum and post-notum with 

 a sparse greyish bloom. Pleura; light brown. Halteres light brown, stem paler. 

 Legs uniform light brown. 



Wings subhyaline, veins light yellowish-brown. Venation: (See fig. i.) : Sc ending 

 opposite origin of Rs, basal deflection of Mi+s about equal to that segment of Mi + i 

 between cross-veins r-m and m; basal deflection of Ciu usually at, or very close to, 

 the fork of M; basal approximation of Cu and 1st A moderate, about one-third of 

 the length of Cu beyond the arculus. 



Abdomen, tergum, sclerites light brownish-yellow, the apice and basis of each 

 sclerite broadly brown, each band as broad as the median pale band; sternum light 

 yellow, the apical fifth of each sclerite brown. Ovipositor of the 9 , upper valve, 

 very long and slender, lower valve also slender, but stouter than the upper valve. 



Holotype: d* Surinam (H. Polah). Allotype, 9 Surinam, (H. Polah). Paratype 

 1, sex? Cordoba, Mexico; April 1, '08 (Fred'k Knab). Paratype 2 9 , Cordoba, 

 Mexico; May 8, '08 (Fred'k Knab). Paratype 3, 9 , Cordoba, Mexico, May 8, '08 

 (Fred'k Knab). Paratype 4, d"> Rio Dulce, Guatemala; Mar. 21, '06 (Schwarz and 

 Barber). Paratype 5, 9 , Cacao, Trece Aguas, Alta V. Paz, Guatemala; April 14, 

 '00 (Schwarz and Barber). Paratype 6, c?, Steamship "Algiers," second day out 

 from Port Limon, Costa Rica; June 20, 1903 (Dr. J. B. L. Layton). Paratype 7, 

 9, Bocas del Toro, Panama; Sept. 28, '03. (P. Osterhout). Paratype 8, Param- 

 aribo, Dutch Guiana (Miss K. Mayo). Paratype 9, 9 Igarape-assu, Para, Brazil 

 (H. S. Parish). 



Types in the U. S. Nat. Mus. coll. (No. 15,128). 



Paratypes in U. S. N. M., except No. 4 in author's collection, No. 8, in Acad. 

 Nat. Sci. Phil, and No. 9 in Cornell University. 



This species exhibits some differences in coloring and other vari- 

 ations from the type-description but I am quite certain that but 

 one species is included. Most of the specimens show clearly the 

 dark basis and apice of the abdominal tergites. Some variation 

 exists in the position of the basal deflection of Cui, in relation to 

 the fork of M. In most specimens it is close to, or at, the fork; 

 in some rather far proximad of the fork; in paratype No. 9 it is 

 distad, underneath cell 1st M 2 . A few examples show an open 

 1st M 2 , occasionally one wing exhibiting this character while the 

 opposite wing is quite normal. 



Explanation of the Plate 2. 



Fig. a. Wing of Teucholabis sackeni, sp. n. 



b. " " Teucholabis pulchella, sp. n. 



" c. " " Teucholabis parishi, sp. n. 



