MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 3G3 



nsually about half as loiig; stigmal veiu or lirst brauch of the radius 

 slightly obli<]ue. 



Abdomeu conic-ovate, the tij) with a slight upward curve, the petiole 

 as long as, or a little longer than, the nietathorax, distinctly tinted or 

 striated; the third segment is short, but usually longer than the fourth. 



Legs much as in Cinetus, but with the tibial s})urs distinct. 



This genus is at once recognized by the long falcate mandibles. 

 The species known to me may be separated as ft)llows: 



Head, thorax, and petiole black. 



8cape, pedicel, and legs yellow ," X. x anthopus sp. nov. 



Head, except clypeiis, l)laek; thorax and abdomen dull rufous. 



Antenna' and legs brownish-yeilow,? X. mandibii.auis sp. nov. 



Brownish ; vertex and disk of thorax blackish 9 X. x anthopus. 



Xeiiotoma xanthopus. sp. nov. 



S . Length, 2.4'""'. Polislied black, pubescent; the abdomeu reddish- 

 brown; mandibles, palpi, two basal joints of antennas and legs bright 

 yellow; tiagellum fuscous. Antenna' 15-Jointed, setaceous, the scape 

 very little longer than the tirst tlagellar Joint; the first flagellar joint 

 the longest, slightly excised at base, the joints beyond very slightlj^ 

 shortening. Metathorax smooth, with a middle carina, the lateral cariucc 

 irregular and broken, descending obliquely toward the posterior coxa^ 

 Wings hyaline, the marginal cell fully two and a halt times as long as 

 the marginal vein. Abdomeu as long as the head and thorax together, 

 ]>ilose beneath, the petiole a little longer than the nietathorax with 

 raised lines. 



$ . Length, 3""". Brownish, with a fuscous pubescence; vertex of 

 head and disk (»f thorax blackish; antennn', mandibles, palpi, and legs 

 yellow. Antenna' 15-jointed, filiform, a tie shorter than the body; 

 scape more than tlirice as long as the first flagellar joint; pedicel 

 rounded; first flagellar joint nearly tlirice as long as the pedicel, the 

 joints beyond to sixth very gradually subecjual, joints from sixth to last 

 hardly longer than thick. Abdomen a little longer tliau the head and 

 thorax together, the petiole twice as long as the metathorax, fluted, the 

 t^ird segment one-third longer ihan the fourth, the second, with faint 

 punctures laterally otherwise it agrets with i . 

 Habitat. — New Jersey. 

 Types in Coll. Ashmead. 



Described from 1 S and 1 9 specimen. 



Xeiiotoma maiidibularis, sp. nov. 



(PI. xiv, Fig. 7, 9 .) 



S 9. Length, 2.5'"'". Polished, i)ubescent; head black, the thorax 

 and abdomen varies from a blackish or brown to dull rufous, more 

 especially rufous in the S . Antenna' and legs pale brownish-yellow. 

 Mandibles long, sickle sliaped, crossing and extending far beyond each 

 other at tii>s. Eyes oval, vertical. Anteume in 9 15-jointed, filiform, 



