TEXAN HYMENOPTERA. 239 



antennas black, two or three basal joints ferruginous; prothorax ferruginous, 

 with a narrow yellow band in front; mesothorax black, with a dull reddish 

 spot over tegulas; scutellum and postscutellum ferruginous, the former with 

 an obscure yellowish spot on each side; metathorax broadly excavated behind, 

 ferruginous, lateral angles prominent, coarsly serrate, yellow, posterior face 

 blackish medially; pleura black, with a small yellow spot beneath tegulas, 

 stained anteriorly with ferruginous; tegulas yellowish, pupilled with ferrugi- 

 nous; wings fusco-hyaline, fuliginous along costa and in marginal cell, viola- 

 ceous; legs ferruginous, knees and tibiae beneath yellowish; abdomen robust, 

 sericeous; first segment rounded, sparsely punctured, more closely so towards 

 apex, ferruginous, a, black spot on basal middle, extending in a narrow line 

 nearly to apex, apical margin broadly yellow, suddenly dilated on each side; 

 second segment closely and strongly punctured, black, with a large dull ferru- 

 ginous blotch on each side separated before apex by a slender black line, 

 apical margin depressed, densely and coarsely punctured, yellow, the margin 

 strongly reflexed; remaining segments densely and strongly punctured, ferru- 

 ginous, more or less black at base, apical margins flat, that of third segment 

 yellowish; venter ferruginous, a small yellow spot on each apical corner of 

 second segment. Length .60 inch. 



%. — Much smaller than $?; spot above base of antennas much larger, sub- 

 triangular and confluent with a spot between antennas; clypeus entirely yellow 

 as well as outer side of mandibles; scape beneath pale yellow, apical joint of 

 flagellum long, narrow, curved, pale yellowish; mesothorax more or less 

 varied with ferruginous, and black, sometimes entirely ferruginous; scutellum 

 generally with a yellow spot on each side; postscutellum always ferruginous; 

 pleura generally ferruginous, with the yellow spot beneath tegulas conspicu- 

 ous; knees, tibias and tarsi more or less yellow; second abdominal segment 

 ferruginous, more or less black at base, besides the broad yellow apical band 

 there is sometimes a rounded yellow spot on each side between base and apex; 

 apical margins of segments 3 — 5 narrowly yellow. Length .45 inch. 



Four specimens. (Belf'rage.) The apical margin of the second 

 segment only is reflexed and the first abdominal segment is strongly 

 punctured. 



Odynerus linn us. n. sp. 



9- — Black, subsericeous; clypeus generally more or less stained with pale 

 ferruginous, with a cuneiform yellowish mark on each side at base, pointing 

 within, the points sometimes confluent; mandibles ferruginous, black at tips, 

 sometimes with a yellowish spot at base; anterior orbits as far up as the emar- 

 gination, sometimes a transverse mark above insertion of antennas, a large spot 

 behind summit of eyes, and scape of antennas in front, yellowish or yellowish- 

 ferruginous; prothorax black, brown or ferruginous, with a more or less dis- 

 tinctly defined yellow band in front; tegulas yellow, pupilled largely with 

 brown ferruginous ; postscutellum and a large spot on each side of metathorax, 

 bright lemon-yellow; wings subhyaline, subviolaceous, costa rather broadly 

 fuliginous; legs ferruginous, coxas, trochanters, and base of femora, black; 

 first segment of abdomen more or less ferruginous, with a central black mark, 

 sometimes larger, sometimes smaller, its apical margin lemon-yellow, dilated 

 into a large angular spot on each side of the segment; apical margin of second 



