40 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



stigmii small. Legs pale ferruginous, the femora with a dusky streak 

 above. Abthnueu black, highly ]»olishe(l, oval, shorter than the tliorax. 



Habitat. — Jacksonville, Fla. 



Type in Coll. Ashmead. 



Distinguished at once by the absence of the mesonotal furrows and 

 the longer and ditterent shape of the prothorax. It is scarcely con- 

 generic with the others; but as 1 have but a single specimen and the 

 mouth parts can not be examined I must be content to allow it to re- 

 main here for the present. In general appearance it closely resembles 

 the $ in MesitiuH. 



SCLERODERMA Latreille. 



Geu. Crust, et Ins., iv, p. 119 (1809); Westw. Traus. Eut. Loc. Lond., ii, p. 164 

 (1839) aud 1881, p. 17; Thes. Eut. Oxon., ]>. 169. 

 Sclerochroa Forster Hym. Stud., ii, p. 168 (1856). 



Head large, subquadrate, above convex; eyes in ? small, the ocelli 

 wanting; in S , eyes and ocelli normal. 



Antenna' 13-jointed, longer in the S , shorter and more incrassated 

 in the 9 . 



Maxillary palpi short, 5-jointed, the apical joints slender ; labial palpi 

 3-jointed, 



Mandibles small, obtuse at apex, 4-dentate. 



Thorax elongate, the prothorax large, triangular or semiovate; me- 

 sonotum scutelliform; metathorax oblong, in 9 narrowed basally. 



Front wings in S without a stigma or stigmal vein, and with only 2 

 short basal cells, the other cells entirely obliterated; 9 apterous. 



Abdomen in i ovate, in 9 greatly elongated, cylindrical aud pointed 

 at apex. 



Legs short, thick, the femora much swollen, tibial spurs 1, 2, 2; claws 

 simple. 



The characters of the male suflBciently separate this genus from other 

 forms, but to distinguish the females from those in closely allied genera 

 is (juite difficult. T am convinced that many females described under 

 this genus, by European authorities, do not i>roi)erly belong in it, but 

 will be found to belong to other genera, i. e., Pristocera, Isohrachinvi, 

 and IHssomphalus, as the mouth parts can not always be stitisfactorily 

 examined. . , , /. 



Only a single species is known in our fauna, as follows: 



Scleroderma macrogaster A slim. 



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



Sclerochroa niacrogaater Ashui. Ent. Am., in, p. 75, $ ; Cress. Syu. Hym., p. 247. 



9. — Length, 3'""'. Head oblong-quadrate, black, polishetl; thorax 

 and legs rufo-piceous, the knees and tarsi, honey-yellow; metathorax 

 honey-yeHow ; abdomen black. Antenna? 13-jointed, honey-yellow, one- 

 fourth longer than the head, the scajic about one-third the length of 



