no. 237S. ASHMEADS PARASITIC CYNIPIDAE—WELD. 449 



a reniform impression behind, two low teeth near middle and a trans- 

 verse ridge near front (best seen in profile), margin of cup thin; disk 

 areloate, prominent ridges running up under cup, truncate behind 

 with a prominent notch and two teeth at each hind corner, sides 

 margined. Mesopleura polished, separated from sternum by carina, 

 with two longitudinal ridges above. Hind tarsus shorter than tibia, 

 claws simple. Basal third of wing dusky, rest hyaline, apical abscissa 

 of subcosta bent up perpendicular to front margin, radial cell open, 

 neither vein quite reaching margin, one and seven-eighths times as 

 long as broad, cell to wing ratio 1:3.5, areolet, cubitus and median 

 wanting, surface pubescent and margin ciliate, reaching beyond tip 

 of abdomen. Abdomen smooth and polished, slightly longer than 

 broad, second tergite occupying whole length, with narrow fringe 

 of hairs at base, normally compressed. 



Length, 1.75 mm. Wing, 1.9 mm. Antenna, 1.8 mm. 



Described from one specimen collected in April. 



Type.— Cut. No. 23648, U.S.N.M. Type female on tag and parts 

 on slide. 



Type locality. — Brazil: Chapada (H. H. Smith). 



Genus ACANTHEUCOELA Ashmead. 



Acantheucoela Ashmead, Trans. Ent. Soc. London, 1900, p. 333.— Dalla Torre 

 and Kieffer, Wytsman Gen. Ins. Cynipidae, 1902, p. 36.— Ashmead, Psyche, 

 vol. 10, 1903, pp. 67, 72.— Dalla Torre and Kieffer, Das Tierreich, Lief. 24. 

 1910, p. 248.— Rohwer and Faoan, Proc. U. S. Nat. Mus., vol. 53, 1917, p. 359. 



Genotype. — Acantheucoela armata (Cresson). Monobasic. 



In both of the Dalla Torre and Kieffer papers mentioned above 

 this genus is placed at the end of the Eucoilinae and not numbered 

 as if it were either doubtfully included in this subfamily or its rela- 

 tionships uncertain. The genus was founded on a single specimen 

 from Cuba and originally described as Cynips ? armatus Cresson and 

 now in the collection of the American Entomological Society in 

 Philadelphia. The United States National Museum has one speci- 

 men of this species, compared with the type by Mr. H. L. Viereck, 

 collected in May, 1910, by H. A. Ballou on Montserrat, in the Lesser 

 Antilles. From this specimen the following notes on generic 

 characters and drawings (fig. 9) have been made. The head is 

 longer than broad, cheeks margined, malar space with groove, shallow 

 sculptured grooves from upper corners of clypeus upward along inner 

 margins of eyes to level of antennae. Sides of pronotum with longi- 

 tudinal ridges. Mesoscutum with faint parallel anterior lines. 

 Mesopleura separated from sternum by a carina and traversed by a 

 longitudinal ridge. 



Acantheucoela belongs in the Eucoilinae and is closely related to 

 Gonieucoela Kieffer, which may prove to be a synonym of it. In 

 27177— 21— ProcN.M. vol.50 29 



