128 A. Arsöne Girault: 



Male: — Length, 0,50 mm. The same; club of antenna slightly 

 more hairy. 



From 4 specimens, the same objective and eye piece. 



Described from. male and twelve female specimens received from 

 Dr. L. 0. Howard for identification, mounted on three slides with 

 Tumidifemur pulchrum Girault — one male, four females; four females; 

 and three males, four females, respectively — labelled ,,From eggs of 

 Horiola arquata. Tunapunta. F. W. Urich, Feb. 1911." 



Habitat: Island of Trinidad (Tunapunta). 



Typ es: Type No. 13,827, United States National Museum, 

 Washington, D. C. one male, four females in baisam (1 slide; mounted 

 with 1 homotype female of Tumidifemus pulchrum Girault). C o - 

 t y p e s — Accession No. 44,254, Illinois State Laboratory of Natural 

 History, Urbana, Illinois, three males, four females in baisam (1 slide; 

 mounted with the cotypes — three females — of Tumidifemur fulchrum 

 Girault). 



Uscanella genus novum. 



This genus is closely allied with Uscana in antennal structures but 

 differs in that the club is only 2-joited and there are two ring-joints; 

 furthermore the fore wings bear long marginal cilia and their discal 

 ciliation is arranged differently; the venation is also different. 



Normal position. 



Female: — With the general build and appearance and with 

 all of the structural characteristics of Uscana Girault. Differing as 

 follows: Antenna 6-jointed — scape, pedicel, two minute ring-joints 

 and a short, stout 2-jointed club which is conic-ovate. Fore wings 

 shaped as in Trichogrammatoidea Girault but the marginal fringes 

 are longer, moderately long, somewhat over a third as long as the greatest 

 wing width, proximad on both margins abruptly becoming very short. 

 Discal ciliation very short like dots, sparse, rather faint, arranged in 

 very regulär lines (about twelve in all), some of which are curved, absent 

 in all of the middle of the wing from the distal fifth to base with the 

 exception of several isolated cilia (not always visible) and a short 

 longitudinal group of about eight exceedmgly minute cilia situated 

 close together at the first break of the submarginal vein; no oblique 

 line of cilia running back from the stigmal vein. Venation straight, 

 the submarginal vein about one and three quarters times longer than 

 the marginal, broken twice, beyond its middle where it thickens to 

 the width of the marginal vein and at its tip where it is discontinuous, 

 actually separated from the marginal vein by a space of the wing 

 membrane; its thicker portion is slightly shorter than the marginal 

 vein and is nearly straight; marginal vein straight, moderately long, 

 its cephalic edge with two emarginations, its distal end projected 

 slightly beyond the origin of the stigmal vein indicating a postm^arginal 

 vein; stigmal vein distinct, oblique, about two thirds the length of the 

 marginal, rather long, gourd-shaped, its neck merely a Prolongation 

 of the knob which is dart-shaped; the stigmal vein points more distad 



