ART. 15". REVISION OF SUBFAMILY PLATYGASTERIXAE FOUTS. Ill 



and more or less punctate as is also the fourth; sixth tergite sha- 

 greened, with a few indistinct longitudinal striae, less than twice to 

 two and one-half times as long as wide, pointed apically; second 

 sternite evenly rounded below and behind, indistinctly angulate 

 above where its upper margin is visible to the apex of the second 

 tergite, its posterior margin reaching to the apex of the fourth seg- 

 ment; sides of the second sternite evenly subconvex, without any 

 deep foveae; relative proportions of the segment, length 14, width 

 9, height 9; wings -hyaline, the anterior pair without marginal cilia. 

 Black (tinged with an amber color in the older specimens) ; tro- 

 chanters, apex of anterior tibiae, and all tarsi except the last joint 

 of each, paler or yellowish; appendages as a whole ver^^ dark colored. 



Type locality. — Jacksonville, Florida, 



Other localities. — Ilagerstown, Maryland; Cabin John, Maryland; 

 and Carlisle, Pennsylvania. 



Type. — Cat. No. 25447, U.S.N.M. Type and two paratypes. 



The types, as well as other collected material, have been used in 

 drawing up the above description. Ashmead's types are faded, so 

 the more recently collected specimens are used in describing color 

 characters. 



The species is susceptible to more or less variation. Relative 

 lengths and widths of the abdominal segments vary somewhat, 

 especially of the sixth tergite. As stated in my description this seg- 

 ment may be two and one-half times as long as wide. In the types 

 it is less than twice as long as wide. 



The specimens from localities other than Jacksonville were collected 

 by the author at various times (July-August, 1915-1920). I have 

 collected the species on the leaves of wild cherry trees, poplar trees, 

 and black locust trees. 



The male specimens mentioned in Ashmead's Monograph belong 

 to the genus Leptacis. Since they were not mentioned in the origi- 

 nal description their affinities need not be indicated here. They 

 remain undescribed. 



2. SACTOGASTER LONGIVENTRIS. new species. 



Female. — Length 2 mm. Head twice as wide as long when 

 seen from above, distinctly, but not excessively, wider than high; 

 seen from in front, feebly triangular, the angles rounded; frons 

 strongly shagreened, more strongly so on the lower part of the face 

 and along the inner margins of the eyes, striate and roughened just 

 above the insertion of the antennae; bases of antennae partially 

 covered by a long triangular spine about the length of the last anten- 

 nal joint, concave above and with its lateral margins extending 

 upward and laterally to form the margins of the antennal foveae; 

 interocellar line twice as great as the ocellocular: ocellocular line 



