1902.] NATURAL SCIENCES OF THILADELPHIA. 67 



Odynerus (Stenodynerus) subapicalis n. sp. 



9 . — Brownish-black ; scarcely pilose, the abdomen with short 

 sparse pale hairs; sides of clypeus, dot betAveeu anlennw, scape 

 beneath, spot on mandibles basally, and a line on fore tibire, 

 yellow; mandibles medially, posterior margin of pronotuni, tegulse, 

 tips of femora, and apical margin of segments 2-G, testaceous ; 

 wings black, especially in costal cell, apical third (except the 

 narrow fuscous apex) whitish. Form elongate; punctuation 

 coarser than in 0. griseus ; clypeus pyriform, distinctly longer 

 than broad, angularly emarginate at apex; middle segment much 

 as in griseus, the crista serrated, the striae of apical portion of 

 concavity oblique on each side, the postero-lateral angles obtusely 

 dentate; abdomen practically as in griseus. Length 13-15 mm. 



d. — Colored as in the female, except that the clypeus is almost 

 entirely yellow, the sculpture coarser; flagellum elongate, longer 

 than in griseus, hooked at tip, apical joint curved, first joint (from 

 above) fully one-third longer than second; clypeus smaller than in 

 $, not much longer than broad. Length 14 mm. 



Mararii and Chapada (April); Rio de Janeiro (November); 

 Santarera. Six female, one male specimens. 



Synoptic Table of Neio Species described in this pajyer. 



1. First abdominal segment cariuated transversely, ... 2 

 First abdominal segment not carinated, 22 



2. First dorsal segment with a distinct longitudinal furrow ; body 



deep black, with or without rather indistinct yellow mark- 

 ings; wings fuscous, apical half pale, . apicipennis 9 cf . 

 Fii*st dorsal segment not furrowed longitudinally, or faintly 



so, 3 



o. Middle segment without a Vidge encircling the depression or 

 concavity, not or scarcely produced at base behind postscu- 



tellum (without horizontal surface), 4 



Middle segment with a more or less developed ridge encircling 



the concavity, s 



4. Apical margin of second dorsal segment entire, ...."> 

 Apical margin of second dorsal segment sharply angulatc or 



dentate medially, 7 



T), Only two abdominal fascia; pronotuni rufuus, '" 



co)ivolutus 9 &. 



All the segments fasciatc; pronotuni not rufous, ... (> 



6. First segment behind carina longer than broad, no transver>o 



smooth area behind carin;', suffusus d'. 



