EMBIO'PTERA OF THE NEW WO'RI.D — ROSS 493 



give no indication of the transverse suture at the base of 10 RPi and 

 10 RPa- It is quite likely that this was overlooked by Enderlein, as 

 the types were probably not cleared ; thus the tentative placement of 

 the species in this group will probably prove to be correct when the 

 details of the holotype are madelniown. 



Genus DIRADIUS Friederichs 



Diradius Fmederichs, 1934, p. 419.— Davis, 1940d, p. 528. 



Genotype. — Diradius pusilhts Friederichs. 



Distribution. — Southern Brazil. 



This genus, known to date by only the unique holotype of its single 

 species, has tentatively been phvced in the Oligembiidae by Davis on 

 the basis of its embioid wing venation with reduction of vein strength 

 comparable to Oligemhia and the nonechinulate left cercus. More 

 detailed information concerning the structure of the male terminalia 

 may prove that the species is congeneric with tho.se of the more re- 

 cently named genus Oligemhia., thus compelling the use of the naine 

 Diradius in its place. It will be best, however, to retain (he |ue::ent 

 status of these species until carefully identified specimens of pusillvs 

 are available, or until its type is redescribed nJu! renjrm-ed in a more 

 fact-revealing manner. 



DIRADIUS PUSILLUS Friederichs 



Diradius pusillus Friederichs, 1934, p. 419, fig. 7a-d. — Davis, 1940d, p. 528, figs. 

 4-7 (after Friederichs). 



Holotype. — Male, Hamburg Museum. 



Type data. — "1 3 , gesammelt von W. Ehrhardt bei dem Ort Isa- 

 belle in Bezirk Humbold des Staates Santa Catharina in Brazilien." 



Family TERATEMBIIDAE 



Terateuibiidae Keauss, 1911, p. 33. — Enderi^in, 1912, p. 98. — Navas, 1918, p. 

 107.— Davis, 1940e, p. 536 ; 1940f, p. 680. 



Type genus. — Teratembia Krauss. 



Distribution. — Argentina. 



This family and its component genus and species are based upon 

 a single specimen. The wing-venational character, R2+3 forked and 

 R4+5 simple, is unparalleled in the order, and, if not anomalous, would 

 perhaps justify the retention of this distinct family. Collectors in 

 Argentina are urged to secure more specimens of this species so that 

 this interesting venational character can be verified and the details 

 of the male terminalia can be more clearly revealed. 



