242 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. ■ 



The parasitism of several of the species is known, and all are para- 

 sites in locust eggs, belonging to the family Acridiidje. 



Some of the species bear a remarkably close resemblance to the 

 Eiirytomin.T. in the family Chalcididse; and, this remarkable mimicry 

 caused Dr. Riley to erect a new genus, Caloptenobia, in tliat family for 

 the reception of a species of SceliOj reared by Mr. Samuel H. Scudder 

 from the egg6 of a locust found in Massachusetts. 



TABLE OF SPECIES. 



Species with parapsidal furrows more or less distinct 8 



Species without parapsidal furrows, coarsely reticulately rugose. 



Coxse aud legs pale brownish-yellow 2 



Coxie black or brown-black ; rest of legs brownish-yellow. 

 Wings fuscous with a stigmal vein and a radius. 



Scape and pedicel brownish-yellow, the Hagellum brown-black ; teguhe rufous. 



S. Fi'sciPENNis Ashm. 

 Wings hyaline ; no stigmal vein and radius. 



9 with the scape beneath pale; pedicel ^ longer than the first flagellar joint; 

 second, third, and fourth flagellar joints very short transverse, the 

 third a little the longest, 2^ times wider than long. 

 ^ with the scape dark brown, flagellar joints, except first and last, about e([ual 

 in length and width, the third scarcely wider than the fourth. 



S. IIYALINIPENNIS Ashui. 



2. Stigma with a stigmal vein. 



Scape and pedicel yellowish, the flagellum brown-black, the first flagellar joint 

 shorter than the pedicel. 

 Venter distiuctly, coarsely striate, but not punctured 9 ; venter with oblong 

 punctures, the surface acicnlated, antennie pale brownish, the third 



flagellar joint much wider than the others <J 8. ovivoRUS Riley. 



Stigma without a stigmal vein. 



9 unknown. <? with the third flagelhir joint wider than either the second or 

 fourth; venter distinctly striated. 

 Antennso brown- black; scape brownish-yellow ; wings hyaline. 



S. PALTJDirES, sp. nov. 

 Antennpp wholly brownish-yellow ; wings subfuscous. . S. pai.lidicornis, sp. nov. 



3. CoxiP dark brown or black; rest of legs browi^ish-yellow. 

 Wings hyaline; no stigmal vein. 



Scape and pedicel brownish-yellow S. (KDIPOD.K, sp. nov. 



Antenna' wholly brown-black S. opacus Prov. 



CoxiB and legs pale brownish-yi'llow. 

 Wings hyaline or but slightl.N tinged. 

 Stigma without a stigmal vein; scape and pedicel, aud sometimes the first two 

 or three flagellar joints pale. 



Abdomen mostly rufous S. HrFlVKNTRis, sp. nov. 



Abdomen black, the venter piceous S. calopteni Kiley. 



Stigma with a short stigmal vein; scape alone pale, although the pedicel and 

 the first flagellar joint are sometimes pale beneath. 

 9 postscutellum striate ; abdomen delicately lougitndyially striated, the ex- 

 treme apex of the segments smooth polished ; angles of metathorax 



on a line with the apex of the metonotum S. LUOGERi Riley. 



9 postsoutellum ])unctate; abdomen hmgitndinally lineated, the venter, ex- 

 cept first .and second segments, smooth ; angles of metathorax rather 

 prominent, covered with a white pubescence. .S,FtiOmpAJHU8, sp. nov, 



