232 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Genus BASSETTIA Ashmead. 



In addition to the generic characters given by Ashmead, the 

 following, taken from the genotype, may be added, and they apply 

 as well to the other species in the genus: The margin of the front 

 wing is not ciliate, the second segment of the antenna is as broad as 

 the first, and both are flattened to fit the curvature of the strongly 

 convex face when the antennae are bent backward, the e} T es are 

 almost flat, flush with the surface of the face, making the outline of 

 head from above almost semicircular. 



KEY TO DESCRIBED SPECIES.' 



1. Head and thorax brownish-yellow pallida Ashmead. 



Head and thorax black or nearly so 2 



2. Wing with distinct brown veins. Ventral spine twice as long as broad. 



tenuana Weld, p. 232. 

 Wing with veins pale. Ventral spine OA r er four times as long as broad 3 



3. Mesoscutum in side view with its arch three-fourths as high as length of eye and 



with an abrupt curvature anteriorly floridana Ashmead, p. 233. 



Mesoscutum with arch six-tenths as high as length of eye and its profile without 

 an abrupt curve anteriorly gemmae Ashmead. 



30. BASSETTIA TENUANA, new species. 



Female. — Black, with tibiae, tarsi, antennae (and in one specimen 

 the whole head) reddish-brown. Head broader than thorax, axial 

 line 0.65 of transfacial, widened behind eyes, coriaceous with scat- 

 tered setigerous punctures, malar space without groove, at least 

 0.9 length of eye, interocular area nearly twice as broad as high, 

 mandibles 2-toothed, palpi 5- and 3-segmented, antennae stout, 

 13-segmented, first longer than third and equal to fourth and fifth 

 together, second as stout as first and equal to fourth, 4-12 subequal, 

 last about twice as long as preceding and fully as stout. Pronotum 

 coriaceous and slightly pubescent. Mesoscutum longer than broad, 

 coarsely coriaceous, with two distinct percurrent parapsides, 

 which, if prolonged, would meet just behind center of scutellum, 

 parallel and lateral lines present, separated from scutellum by a 

 distinct suture. Scutellum coarsely coriaceous, narrower behind, 

 with two narrow, deep, smooth, distinctly separated pits at base 

 and two impressed areas at sides. Propodeum with two straight 

 carinae inclosing a slightly reticulate area wider than high and slightly 

 narrower at the top, petiole rugose. Legs with hind tarsus shorter 

 than tibia, second shorter than fifth, claws weak, simple, divergent. 

 Wings rather broad, width 0.42 of length, transparent, with distinct 

 yellowish-brown veins, first abscissa of radius arcuate and slightly 

 clouded, second strongly bent, areolet distinct, cubitus reaching 



5 Cynips tenukornis Bassett, which Ashmead placed in this genus (Trans. Amer. Ent. Soc, vol. 14, p. 147), 

 is a Diplolepis Geoflroy. The mesoscutum is not transversely rugulosc, not longer than broad, the first 

 two segments of antenna are not flattened, tarsal claws have a distinct tooth, and the wing margin is ciliate. 



