Synonymic and Descriptive Notes on the Hymenoptera Chaicidoidea. 129 



than caudad. Its imcus disto-cephalad. Posterior wings lanceolate, 

 sinall, with three coinplete lines of discal cilia, the cephalic one of 

 which is less conspicuous and shortest, the blade at apex of the venation 

 acute and proxiniad with a rather slender petiole. Marginal cilia 

 (caudad) of posterior wing slightly shorter than those of the fore wing 

 (distad) but nearly twice longer than the wing is wide (across apex 

 of the venation); posterior wing usual in length. Legs normal, the 

 tarsi 3-jointed, the joints short, the tibial spurs single, short (cephalic 

 tibiae and tarsi not seen). Ovipositor barely projecting beyond tip 

 of abdomen, not conspicouus. Claws curved. 



Male: — Unknown. 



A genus characterized by the short antennae bearing a conic-ovate 

 2-jointed club and two ring-joints, by the venation and ciliation of the 

 fore wings and the short blunt abdomen. Among others, it is nearly 

 similar in antennal structure to Tumidiclava Girault, but the club is 

 only 2-jointed, the stigmal vein long and the marginal fringes long. 



Type: Uscanella bicolor species nova, described herewith. 



1. Uscanella bicolor species nova. 



F e m a 1 e : — Length 0,45 mm. Moderately small for the sub- 

 family. 



General color brownish yellow, the abdomen black ; legs, antennae 

 and venation concolorous; eyes and ocelli red; fore wings slightly 

 fumated, more noticeable under the venation; a very small fuscous 

 blotch along the caudal (proximal) edge of the stigmal vein; meta- 

 thorax paler. Tegulae dusky. 



Antennae with the two club joints unequal, obliquely divided, 

 the distal one nearly twice longer, cone-shaped, the proximal one 

 subhemispherical ; pedicel oval, not quite as long as the distal club 

 Joint and not as wide; scape not lang. 



From five specimens, 2/3-inch objective, 1-inch optic, Bausch 

 and Lomb. 



Described from five female specimens mounted in baisam received 

 from Mr. F. W. Urich through the courtesy of Dr. L. 0. Howard and 

 labelled ,,From eggs of Horiola arquata. Tunapunta, F. W. Urich, 

 Feb. 191L" 



Habitat: Trinidad (Tunapunta). 



Typ es: Type No. 13,828, United States National Museum, 

 Washington, D. C., four females in baisam (1 slide). Co type: 

 — Accession No. 44,255, Illinois State Laboratory of Natural History, 

 Urbana, Illinois, one female in baisam. Type locality. — 

 Trinidad. 



Uscanoidea genus novum. 

 A genus allied with and resembling both Uscana Girault and 

 Uscanella Girault but differing from the former in having a pointed 

 conic-ovate abdomen which is longer than the thorax, in bearing a 

 shorter, soi ewhat swollen and compact 2-jointed antennal club and 

 in lacking a ring- Joint in the antennae; from the latter genus it is 



Archiv für Naturgeschichte -, 



19U I. 2. Suppl. y 



