48 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



or rounded iu trout; mcsouotum short, without furrows; scutellura 

 with a transverse furrow at base; metathorax subquadrate, rounded 

 behind. 



Front wings with a very short submarginal vein, terminatiug iu a 

 callous spot and a small stigma; costal cell oi)en; the s tig mal vein and 

 basal cells wanting. The 9 is usually apterous without ocelli, although 

 sometimes winged with the venation as in the male. 



Abdomen ovate or oval, subpetiolate, the second and third segments 

 large, about equal, the following short, the posterior apical margins of 

 the segments usually straight. 



Legs short, stout, the femora swollen, the anterior i^air larger than 

 the others, tibial spurs, 1, 2, 2, claws simple. 



For many years the true position of this genus was obvscure. Prof. 

 Westwood in his original description stated it was allied to Teleas, and 

 Forster, as late as 1856, in his Hymenopterologische Studieu, without 

 a personal acquaintance with it, incorporated it among the Diaprmue. 

 It has been fully elucidated since, however, and properly placed by 

 Westwood in the BrthyUiuv, details of which will be found in the Pro- 

 ceedings of the London Entomological Society for 1881, p. 125. 



The degraded type of venation and the absence of basal cells readily 

 distinguish the winged form from other genera in the group ; but with the 

 apterous forms it is quite different, and great care must be taken to 

 examine the mouth parts for the characters laid down in the table, or 

 one is apt to confuse them with Scleroderma. 



Only three species a^-e known in our fauna, which may be tabulated 

 as follows : 



Winged 2 



Wingless, without (icelli. 



Entirely V)rownish yellow or lioney -yellow C. gallicola Aslim. 



Head, thorax, and logsrufo-testaceons, the collar anteriorlj^ and the meta- 

 thorax waxy white. 



Abdomen black C. cyxipipiiila Ashm. 



2. Polished black ; legs piceous. 



Wings hyaline C. h yalinipennis sp. nov. 



Rnfo-testaceous, collar and base of abdomen yellowish. 



Wings subhyaline C. nubilipennis Ashm. 



Cephalonomia gallicola Ashm. 



(PI. Ill, Fig. 6, 9.) 



Sclerochroa (/nlHcoJa Ashm., Ent. Am., ill, p. 75, 9 ; Cress., Syn. Hym., p. 247. 



9 . — Length, 1.8™™. Honey- yellow or pale brownish-yellow, smooth, 

 polished. Eyes small, round. Antenna^. 12-jointed, about as long as the 

 head ; scape one-third the length of the head ; pedicel a little longer than 

 thick; the Hagcllar Joints all small, submoniliform. Abdomen pointed, 

 ovate, a little longer than the head and thorax united; the apical 

 margins of the second and third segments slightly emarginate. 



Habitat. — .lack son ville, Fla. 



Type 9 in Coll. zVshmead. 



