172 AVILLIAM J. FOX. 



the episternal suture strongly foveolate, the epimerum toward the metapleurse 

 somewhat rugose : middle segment above with coarse ridges running from the 

 base to the sides, those on the posterior face transverse and less strongly developed, 

 lateral ridges strong, extending to the upper surface, sides of middle segment finely 

 striated, scarcely so medially. Black ; a spot at base of mandibles generally con- 

 fined to inner margin, clypeus, scape, two large spots on pronotum, tubercles, 

 scutellum anteriorly, tibise, except a spot within and sometimes an outer sjiot at 

 apex of hind pair, first joint of tarsi, a sinuous spot at each side of first abdominal 

 segment, wedge-shaped spots on second, narrower and longer, somewhat sinuated 

 spots on third and fourth, and a medial elongate spot at apex of fifth, sometimes 

 connected with small lateral dots, which are not always present, yellow ; femora 

 entirely black ; wings subhyaline, dusky apically, nervures in basal half testa- 

 ceous, the stigma and remaining veins dark ; silvery pubescence in the usual 

 situations, rather long on the cheeks and thorax beneath. Length 9-10 mm. 



'J, . — Head more coarsely punctured, the vertex and upper part of front dis- 

 tinctly striated ; cheeks beneath near the eye-margin with a slight keel ; mandi- 

 bles but slightly swollen toward the base on outer margin : dorsulum more dis- 

 tinctly punctured than in female, the mesopleurje less distinctly so; epimerum 

 mesoi)lenralis separated frtmi the mesosternuni by an exceedingly strong furrow; 

 middle segment coarsely rugose ; above the ridges form large, irregular fovete, on 

 posterior face are transverse, sides rather coarsely striated ; nervures entirely 

 testaceous; marked as in the ?, but the fore and medial tibiae are not dark 

 within, and the spots on segments 4 and 5 are connected ; tibial shield somewhat 

 cordiform, its outer margin being produced to give it this shape, in color dark 

 brown, narrowly streaked with yellow, except basally ; flagellum testaceous be- 

 neath, not noticeably broadened; first joint of medial tarsi but slightly longer 

 than the combined length of the remaining joints. Length 7-11 mm. 



Nova Scotia (Smith) ; Ottawa (Harrington) ; Maine ; Long Island 

 (Ashinead); Philadelphia, Penn.sylvania (Seeber) ; West Point, 

 Nebraska (Barber) ; Colorado ; Washington. The % referred by 

 Smith to this species is C. nigrifrons Cresson, as no species of this 

 section have the antennae formed as described by Smith. Packard 

 evidently had C. vicinus confused with this species, which accounts 

 for his statement regarding the finely striated propodeum (middle 

 segment >. Of the three type specimens of C. mccinctus Cresson, 

 examined, I find two are advenm, and the other identical with C. 

 viclnu>i. It would be impossible to straighten out the synonymy of 

 this species, had I not the oi)i)ortunity of examining the types of 

 Cresson. Packard gives no locality for pegaxii-^, but his specimens 

 were presumal)ly from some of the New England States. 



50. €rabro lliyreophorus Kohl. 



Cmhro {Tht/reopas) thyreophums Kohl, 1. c, p. 585, pi. xiv, figs. 27, 29, % ^. 



9 .—Head with the sculpture subtile; first joint of flagellum distinctly shorter 



than the following two united ; space between hind ocelli less than that between 



them and the nearest eye-margin ; pronotum not furrowed, the sides anteriorly, 



not dentate, rounded laterally ; dorsulum with sparse, shallow punctures, densest 



