FAM. XENID^E 



29 



Female. — Cephalothorax slightly constricted at base, wider than long, widest behind spiracles; 

 spiracles not laterally prominent, mandibles subquadrate, toothed on inner angle, sides convex, apex 

 sinuatelv convex. 



Type of genus. — T. indicus, Pierce. 



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

 1. T. indicus, Pierce, Proc. U. S. Nat. Mus. Vol.40, p. 5o2 (1911). — India. 

 PI. 4, Fig. 25. 



4. Tribus OPHTH A LM OCH L I N I , Pierce 



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

 Homilopinse. Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. So (1908). 



Characters. — This tribe is rather arbitrarily formed to include the genera parasitic on 

 Sphecidag, until a more logical classification can be devised. 



I. Genus EUPATHOCERA, Pierce 



Eupathocera. Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. 79 (1908); Bull. U. S. Nat. Mus. no. 66, 

 p. i 4 3 (1909). 



Characters. — Male. — Head transverse, vertex inedianly produced in a high ridge, on each 

 side of which arise the antennas. Mandibles flattened, scimitar-like; maxillae two-jointed. Antenna; 

 typically xenid. Prothorax and mesothorax transverse. Metathorax elongate; prasscutum subquadrate, 

 broadest at base, truncate at apex, scuti separated narrowly by apex of scutellum; scutellum triangular; 

 postlumbium very short, transverse and not differently colored or of different consistency from the other 

 parts. Wings with eight primary veins; with two detached veins between radius and medius and one 

 between medius and cubitus. CEdeagus inflated and angulate near base, thence tapering to apical fourth, 

 at which point it is again bent at a right angle, and thence tapers to a vers- sharp point. 



Female. — Cephalothorax widest behind spiracles, more or less evenly convex throughout: 

 spiracles dorsal; mandibles subquadrate with a large tooth on inner apical angle, 



Triitngilinid. — Similar to that of Pseitdoxenos. 



Type of genus. — E. Itigiibris, Pierce. 



Geographical distribution of species. — Parasites of wasps of the genus Sphex (Ammophila). 



1. E. lugubris, Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. 83 (igoS); Bull. Ohio. 



U.S. Nat. Mus. no. 66. p. 143. pi. io.ff. n, 12, 14 (1909). — PI. 2, 

 Fig. I; PI. 4, Fig. 26. 



2. E. piclipennidis, Pierce, Proc. U. S. Nat. Mus. Vol. 40, pp. 5o2,5o3(ign). Illinois. 



3. E. pruinosae, Pierce, Bull. U. S. Nat. Mus. no. 66, pp. 143, 144. pi. n, Colorado. 



f. 7 (1909). 



4. E. sphecidarum, Dufour. France, Germany. 



Xtnos sphecidarum. Dufour, Ann. Sc. Xat. (21, Zool. Vol. 7, pp. iS, 19. 



pi. 1, f. 16 (i83y). 

 Paraxeiios sieboldii. Saunders. Trans. Ent. Soc. Lond. p. 47 (1872). 

 E. sphecidarum, Pierce. Proc. Ent. Soc. Wash. Vol. 9. p. 79 (igoS). 



5. E. vulgaridis, Pierce, Proc. U. S. Nat. Mus. Vol. 40, p. 5o3 (191 1). Illinois. 



