ART. 15». REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 23 



aciculate laterally and below; abdomen about as long as the thorax; 

 appendages generall}^ lighter colored, the femora and tibiae not so 

 strongly darkened, brownish. 



Type locality. — Jacksonville, Florida. 



Type.— C&t. No. 25431, U.S.N.M. 



Redescribed from the type specimen. It is mounted on a card 

 point and is in perfect condition. 



VIII. Genus PLATYGASTER Latreille. 



Platygaster Latreille, Gen. Crust, et Ins., vol. 4, 1809, p. 31. (Monobasic.) 



Genotype.— Platygaster ruficornis Latreille (by original designation). 

 Polygnotiis Foerster, Hym. iStud., Heft 2, 1856, pp. 108, 115. (Monobasic.) 



Genotype. — Platygaster striolatus Nees (by original designation). 

 Hypocampsis Foerster, Hym. Stud., Heft 2, 1856, pp. 108, 115. No species 



originally included. 

 Aneuron Brues, Bull. Wise. Nat. Hist. Soc, vol. 8, 1910, p. 49. (Monobasic.) 



Genotype. — Aneuron anormis Brues (by original designation). 

 Xestonotidea Gahan, Proc. U. S. Nat. Mus., vol. 56, 1919, p. 524. (Monobasic). 



Genotype. — Xestonotidea foerster i Gahan ( by original designation ). 



This genus was pather briefly treated in a former paper by the 

 author. It was shown to be identical with Polygnotus Foerster and 

 with several other Foersterian genera as interpreted by Ashmead in 

 his Monograph.^ I have found thafr the genus Aneuron Brues* is also 

 a synonym of Platygaster. For awhile I considered it distinct, not 

 having seen any such peculiar antennal structure in the great quantity 

 of material at my disposal. However, Platygaster jioridensis Ashmead 

 and caryae Ashmead agree with Brues' description of Aneuron except 

 that the female of each species has the third antennal joint, though 

 elongate, distinctly shorter than either the second or the fourth. The 

 structure of the male antenna in these species, though peculiar, is 

 not very far removed from the Platygaster type. It is merely a ques- 

 tion of degree, and such differences, unless of considerable magnitude 

 can not be used to separate genera. P. Jioridensis has the lower tooth 

 of the mandibles a little longer than the upper; caryae has the teeth 

 equal or approximately so, as in most species of Platygaster. I can 

 not compare Aneuron anormis Brues with other species in terms of 

 mandibular structure since Professor Brues neglected to say anything 

 about such parts in his description. 



The distinguishing feature of Hypocampsis Foerster seems to be the 

 broad flat abdomen with its wide lateral ventral margins. This 

 peculiarity I do not consider generic. My new species s^as^ensis and 

 lucida agree in every respect with Foerster 's original description of 

 Hypocampsis. Shastensis was, like Foerster 's specimens, reared from 

 the cones of Ahies, and lucida was reared from tiie cones of a related 



'Proc. Wash. Ent. Soc, vol. 22, p. 69 (1920). 



'Described la Bull. Wise. Nat. Hist. Soc, vol. 8, 1910, p. 49. 



5596— 24— Proc.X.M. vol.63 20 



