FAM. XENID/E 3 i 



Geographical distribution of species. — Parasites of wasps of the genus Chlorion, subgenus 

 Proterosphex . 



2. 0. abbotti (Homilops). Pierce, Bull.U. S. Nat. Mus. no. 66, p. 147 (1909). Siam. 



3. 0. askmeadi (Homilops), Pierce, ibidem, pp. 146, 147, pi. 11, f. 8 (1909). Santo Domingo. 



4. bishoppi (Homilops), Pierce, ibidem, p. 146, pi. 1 1 , f . 6 (1909). Texas. 



5. O. westzvoodi, Templeton. Brazil. 



Xcnos westwoodi. Templeton, Trans. Ent. Soc. Lond. Vol. 3, pp. 5i56; 



pi. 4, ff. A-E (i83S). 

 Homilops westtvoodi, Pierce, Bull. U. S. Nat. Mus. no. 66, p. 146; pi. 10, 



ff. 9, 10 (1909). 



3. Subgenus ISODONTIPHILA, nov. subgen. 



Type of subgenus. — 0. auripedis, Pierce. 



Geographical distribution of species. — Parasites of wasps of the genus Chlorion, subgenus 

 Isodoutia. 



6. O. auripedis. Pierce, Proc. U. S. Nat. Mus. Vol. 40', p. 5o3 (191 1). Pennsylvania, Maryland. 



3. Genus SCELIPHRONECHTHRUS, Pierce 



Sceliphronechthrus. Pierce, Bull. U. S. Nat. Mus. no. 66, p. 141 (1909). 



Characters. — Female. — Cephalothorax slightly contricted at base, thence obliquely widening 

 to widest point, just behind the spiracles, which are lateral, but hardly prominent, thence sinuately 

 convex to apex; mandibles dentate on inner apical angle. 



Type of genus. — S. fasciaii, Pierce. 



Geographical distribution of species. — Parasites of wasps of the genus Scelipliron. 

 1. S. fasciati, Pierce. Bull. U. S. Nat. Mus. no. 66, p. 142 (1909). Santo Domingo. 



5.TRIBUS PARAXENINI, PIERCE 



Paraxenini. Pierce. Bull. U. S. Nat. Mus. no. 66, p. 140 (1909). 



Characters. — A temporary tribe to include a genus of parasites of the Bembecidae. 



I. Genus PARAXENOS, Saunders 



Paraxenos. Saunders, Trans. Ent. Soc. Lond. pp. 45, 46, pi. 7, ff. 5, i3-i5 (1872); Pierce, Bull. 

 U. S. Nat. Mus. no. 66, p. 140. pi. 10, f. 1 (1909). 



Characters. — Male. — Head transverse. Mandibles broader at base, arcuate; maxilla? with 

 basal joint stout, arcuate; palpus cylindrical. Antennae typically xenid. Wings with eight primary veins 

 from base, and with two detached veins between radius and medius. Tarsi four-jointed, without claws. 



Type of genus. — P. erberi, Saunders. 



Geographical distribution of species. — Parasites of wasps of the genus Bembeeinus. 



1. P. erberi, Saunders, Trans. Ent. Soc. Lond. p. 46, pi. 7, ff. 5, i3-i5 Corcyra. 

 (1872). — PI. 5, Fig. 8. 



P. erberi, Pierce. Bull. U. S. Xat. Mus. no. 66, p. 141, pi. 10, f. 1 (1909). 



