228 CHAS. A. BLAKE. 



base, receiving the first recurrent about the middle, tliird hexagonal, receiving 

 the second recurrent beyond the middle. Legs black, tinely punctured, thinly 

 clothed with black hairs, calcaria white. Abdomen ovate, basal segment 

 campanulate, black, closely punctured, second and following segments shining, 

 ferruginous, finely punctured, apical margins fuscous, fringed with black 

 pubescence. Underside as above. Length 6 lines, expanse of wing 11 lines. 



Hah. — Pennsylvania, Delaware. 



This uiay^ be M. vigilaiu. Say : the neurtion being the same as in 

 that species. The second abdominal segment is entirely bright ferru- 

 ginous, while vigilans has the basal and npical margins black. 



3. Mutilla hexagona, Say, Bost. Jour. I, p. 295, 2. 



Male. — Head and thorax black, abdomen dark honey-yellow, basal segment 

 black, scape of antennae tufted; wings fuliginous; third submarginal cell hex- 

 agonal, eyes ovate, emarginate. Length 6 — 7 lines, expanse of wings 11 

 lines. 



Hah. — Western and Southern States. 



4. Mutilla Grotei, n. sp. 



Male. — Head and thorax black, head not as wide as the thorax, rounded, 

 closely punctured, clothed with short black hairs j antennse blackish, scajie 

 rufous, clothed with glittering pubescence; eyes ovate, emarginate. Thorax 

 robust, subquadrate, rounded behind, thinly clothed with short black hairs, 

 pro- and mesothorax closely punctured, the latter elevated, metathorax coarse- 

 ly reticulate, abruptly rounded. Wings ample, pale fuliginous, marginal cell 

 large, sublanceolate, gradually rounded to tip, three distinct submarginal cells, 

 the first nearly as long as the marginal, second not quite as long as the first, re- 

 ceiving the first recurrent nervure in the middle. Legs black, clothed with ful- 

 vous hairs, calcaria whitish. Abdomen elongate ovate, basal segment black 

 closely punctured, thinly clothed with brownish hairs, second segment fulvous> 

 finely punctured, having on the disc a longitudinal black patch, extending 

 nearly to the apical margin, thQ remaining segments cloth with dense golden 

 fulvous pubescence; under side clothed with short fulvous hairs. Length 7 

 lines, expanse of wings 12 lines. 



Hah. — Colorado. This species is dedicated to my friend Aug. R. 

 Grrote, to whom I am indebted for much reliable entomological inform- 

 ation. 



5. Mutilla oajaca, n. sp. 



Male. — Head and thorax black, closely and deeply punctured, clothed with 

 scattered pale j'ellowish pubescence; eyes large, ovate, emarginate ; antenuse 

 black; metathorax rounded, posteriorly abrupt, with a scattered black pubes- 

 cence. Wings blackish, paler towards the base, marginal cell moderately 

 long, rounded at tip, extending beyond the third submarginal, three submar- 

 ginal cells, the first about as long as the marginal, the second shorter ^and 

 narrowed towards the first, receiving the first recurrent nervure about the 

 middle, the third submarginal clearly defined, subpentagonal. Legs black, 

 clothed with long pale yellowish pubescence. Abdomen elongate ovate, fer- 

 ruginous above and beneath, finely punctured, apical margins of all the seg- 



