468 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Male. — Length 2.6 mm. Similar to the female but with the first 

 tergite comprising about two-fifths of length of abdomen, the second 

 tergite dorsally completely concealed beneath the first. Antennae 

 mostly missing from the one specimen available. 



Tupe locality. — Orizaba, Mexico. 



Type.—V.S.'^.M. No. 54262. 



Described from 4 females (one holotype) and one male bearing only 

 the label "Orizaba." The collector and date of collection not known. 



5. MONODONTOMERUS MEXICANUS. new species 



Similar to montivagus Ashmead but distinguishable at once by the 

 conspicuous fuscous cloud embracing the stigmal vein, by the propor- 

 tionally shorter ovipositor, and by the conspicuously hairy eyes. 



Female. — Length exclusive of ovipositor 2.75 lo 4 mm., ovipositor 

 0.8 to 1.38 mm. Head dull metallic green, often more or less tinged 

 with brassy; thoracic dorsum dull coppery green; propodeimi, pleura, 

 all coxae, and all femora dark green; mesepimera brassy; tibiae and 

 tarsi reddish testaceous; antennal scape testaceous, sometimes washed 

 with metallic green toward apex; pedicel dark metallic; flagellum 

 black; mandibles testaceous; wings hyaline except for a conspicuous 

 fuscous cloud embracing the stigmal vem and extending approxi- 

 mately one-third of the way across the wmg; tegulae metallic green; 

 abdomen greenish black; ovipositor sheath black with the extreme 

 apex and a narrow longitudinal stripe extending from base two-thirds 

 of the distance to apex testaceous. 



Head nearly uniformly heavily jshagreened and rather densely 

 clothed with conspicuous whitish hairs; eyes densely and conspicu- 

 ously pilose; ocelli in a low triangle; ocellocular line equal to or very 

 slightly exceeding diameter of lateral ocellus; temples nearly trans- 

 verse; length of eye about three and one-half times length of malar 

 space; malar furrow complete; anterior margin of face nearly straight, 

 the clypeal margm very slightly protruded but straight. ' Antennal 

 scape subcylmdrical, not quite reaching anterior ocellus; pedicel 

 approximately one and one-half times as long as broad; rmg joint 

 transverse; funicle thicker than pedicel and of the same thickness 

 throughout; first funicular jomt slightly longer than broad, the 

 following joints subquadrate; club not thicker than funicle, conic 

 ovate, and about equal in length to the two preceding funicular joints 

 combined. 



Pronotum, mesoscutum, scutellum, and axillae strongly shagreened 

 and conspicuously hahy; scutellum about as broad as long, with a 

 distinct but shallow transverse furrow behind the middle, and cari- 

 nately margmed at apex, the groove setting off the apical carina not 

 interrupted medially; surface of scutellum behind transverse furrow 



