198 AMEEICAN HYMENOPTERA. 



sulura, postscutellum, apical margins on the first, second and fourth dorsal seg- 

 ments of the abdomen, the second ventral segment with a marginal spot on each 

 side of the segment, apical third of anterior femora behind largely, apical third 

 of middle femora in front largely, the tibiae in front, excepting at apex, yellow, 

 tibiie at apex brown, the posterior pair black, behind they are all partly brown, 

 mostly black, greater part of tegulte brown ; tarsi brown. 



% . — Very like the female, the vertex ordinary, not tuberculate, the reflection 

 of the margin of the second dorsal abdonjinal segment forming an acute angle. 



Color. — Differs from the female as follows: the yellow spot of the orbital sinus 

 prolonged to the insertion of the antennae, clypeus all yellow, mandibles yellow, 

 excepting along the margins, middle coxae and femoia anterioily yellow, tibiae 

 and metatarsi almost entirely yellow, no yellow spot on dorsulum, fifth and sixth 

 dorsal abdominal segments with an apical band, second ventral segment with an 

 apical yellow band, a lateral marginal spot of yellow on the third dorsal and ven- 

 tral segments, antennae brownish beneath. 



Type. — University of Kansas. 

 Type locality. — Hamilton Co., Kansas, 3250 ft. 

 One female, collected by F. H. Snow ; S type and paratype taken 

 in Colorado by F. H. Snow. 



Odynerus leioiiotus n. sp. 



Related to conformis. 



9. — 11 mm. — Head. — As in conformis 



Thorax. — Likewise as in conformi.t. 



Abdomen. — With the second segment reflexed, so as to form a right angle ; no 

 transverse rugose edge on the first dorsal segment. 



Color. — Nearly as in vagus, but the arcuate line at summit of the clypeus is 

 interrupted, all the dorsal abdominal segments, except the apical one, with the 

 apical margin banded with yellow, while only the apical margin of the second 

 ventral segment is margined, in other respects like vagus ; the femora, however, 

 are largely ferruginous, the anterior and middle pair partly yellow, and all the 

 femora partly black. 



Type locality. — Douglas Co., Kansas, 900 ft. 

 One female, taken in July, by E, S. Tucker. 



Odynerus exceutralis u. sp. 



Differs from bravo chiefly in its livery and subgenerically. 



9 . — 11 mm. — Head. — No vertical carina on the clypeus joining it to the head. 



Thorax. — Border of the metathorax almost rounded, not trechant. 



Abdomen. — 'No suture on the first dorsal abdominal segment. 



Color. — Differs from bravo as follows: mandibles largely black, antennae black, 

 flagellum brownish beneath, scape as in bravo, clypeus with a basal arcuate line 

 broken in the middle, a dot on the tegulae and a dot adjoining the same yellow, 

 legs ferruginous, coxae and trochanters black, anterior and middle femora tipped 

 with yellow, anterior tibi* with a yellow streak in front. 



