MONOGRAPH OF TIIK NORTH AMERICAN rROCTOTUYl'ID.E. 247 

 Scelio floridauus, h]>. ihiv. 



9 . Length, 3 to3i"'". Densely bla<'k, snbopatjne, with rather coarse 

 reticulated jjunctures, the thorax with distinct furrows, the postseu- 

 telluni highly ridged. Antennae brown-black, the scape, legs, and 

 mandibles, yellow; funiclar Joints transverse, the club large fusiform, 

 wider than h)ng; angles of metatliorax prominent. Wings subhyaline, 

 the venation yellowish, the submarginal vein ending in a shght stigma 

 and an oblique stigmal vein, the latter with an indistinct radius. 

 Abdomen fusiform, lineatedly rugose; tirst segment transverse-quad- 

 rate of an equal length with the fifth, the second, longer, the third, 

 the longest segment, the fourth shorter than third, the sixth, sub- 

 equal with the fifth, the seventh much shorter; the venter polished, 

 tlie segments striated towards apex. 



Habitat. — Haw Creek and Ja<;ks<mville, Fla. 



Types in National Museum and ('oil. Ashmead. 



Subfamily VI.— PLATY(^ASTP:RIN^. 



Head transverse, rarely quadrate. Ocelli 3, triangularly arranged. 

 Mandibles bifid at tips. Maxillary palpi 2-jointed; labial palpi 1- 

 joiuted. AntenniB elbowed, clavate, most frequently 10-jointed in both 

 sexes, rarely 8 or 9-jointed, inserted at the base of the clypeus. Pro- 

 notum never very large, scarcely visible from above, mesonotum most 

 frecjuently transverse, with or without furrows; scutellum variously 

 shaped, often with an awl shaped tip or spined, flat, semicircular or 

 l)illow-shaped; metatliorax short, with a median sulcus. Front wings 

 most frecinently entirely veinless, or with a submarginal vein termi- 

 nating in a stigma before attaining the costa, the basal nervure rarely 

 present; hind wings lanceolate, veinless. Abdomen petiolate or sub- 

 petiolate, ovate, oblong-oval or conic-ovate, depressed, very rarely 

 greatly elongate, usually composed of 6 visible segments and always 

 carinated at the sides, the second segment the longest. Legs long, 

 the femora and tibiae clavate, the tibial spurs 1, 1, 1, the tarsi, except 

 in a single genus, Tphetrachelua, 5-jointed, the claws simple. 



A very large and extensive grouj), at one time classified with the 

 ScelionhKC, but readily distinguished by the 10-jointed clavat« an 

 tenuie, the 2-joiuted maxillary palpi, 1-jointed labial palpi, and the 

 bifid mandibles; the wings, except in a few genera, being entirely vein- 

 less and wholly diflFerent from the Scelioninsv. 



The group is divided into numerous genera, the species of which con- 

 fine their attacks almost exclusively to the Dipterous families Cecido- 

 myiidu' and Tipulidte, the only records conflicting being two recorded 

 by Ratzeburg. Platygaster contorUcornis Ratzb. is said to have been 

 bred from Tortrix strobilana and P. mucronatus Ratzb. from Tortrix 

 resinatia. 



