ART. 15». REVISION OF SUBFAMILY PLATYGASTERIis^AE FOUTS. 135 



greatly in color but are rather dark in the majority of specimens; the 

 antennae and front legs and also all tarsi always have a fair percent- 

 age of yellow. 



Type locality. — Glen Echo, Maryland. 



Type. — Cat. No. 25467, U.S.N.M. Type, allotype and three para- 

 types. All on one pin. 



Described from 13 specimens, 10 males and three females, collected 

 by the author in the spring of the year 1917. The dates vary from 

 April 29 to June 19. 



I believe this to be the most variable species I have described so 

 far. It is fortunate that we have so many specimens as false concep- 

 tions would arise otherwise. Care should be taken not to be too 

 strict in interpreting comparative lengths in which the abdomen as 

 a whole figures. In proportion as the terminal segments are extended 

 or retracted the abdomen will actually be longer or shorter. It is 

 only the first and second segments that remain in constant proportion, 

 not in constant length, and this is because they are not telescopic. 



It may be well to mention here that the size of the insect is not 

 constant. One of the female paratypes is only 0.88 mm. in length, 

 and several of the male paratypes are as long as 1.22 mm. 



25. LEPTACIS FLORIDANA Ashmead, 



Plate 1, fig. 20. 



Leptacis flondanus Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 272. Male and 

 female. 



Male. — Length 1.10 mm. Head twice as wide as long, distinctly 

 wider than the thorax, entirely shagreened, more coarsely so than in 

 rujiscapa; thoracic ratio: Length 27, width 15, height 19; notauli 

 distinct, nearly reaching to the margin of the pronotum; mesontum 

 shagreened, spine distinct but not very long, directed straight back- 

 ward; abdomen obovate, as long and as wide as the thorax; second 

 tergite as long as wide, without sculpture of any sort: segmental 

 ratios (petiole not included): Lengths, 15, 2, 2.2, 2.2, 3; widths, 15, 

 11, 9, 6, 4; tergites 3-6 shagreened; wings hyaline, without cilia. 

 Black; base of scape and parts of legs reddish yellow ; femora, tibiae 

 for the most part, and last joint of each tarsus, brownish. 



Type locality. — Jacksonville, Florida. 



Tjpe.—Cat. No. 25468, U.S.N.M. Type selected. 



Description based on male type. An antenna is mounted in balsam 

 on a slide. 



Two males and one female included by Ashmead in the type series 

 do not belong to this species. They remain undescribed. The male 

 selected agrees best with the original description. 



5596— 24— rroc.N.M. vol.63 27 



