200 AMERICAN HYMENOPTERA. 



tegulsB, line on mesopleura. basal corners and apical margin of scutelluni, tro- 

 chanters, apex of femora, four anterior tibiae and tarsi, basal half of first abdom- 

 inal segment, lateral apical corners of segment two and apical margin of segments 

 3-5; basal two-thirds of antennte, mandibles, palpi, four anterior femora and 

 posterior tibise and tarsi, dusky rufous: wings hyaline, except a smoky patch on 

 the marginal and upper portion of submarginal cells; stigma yellowish, third 

 discoidal cell considerably broader at base than at apex ; pleura and head shining, 

 coarsely, but closely punctured ; lateral basal areas of metathorax punctured 

 nearly as much as the median; abdomen densely punctured and with median 

 carina to the apex of segment five. 



One specimen from Gaylord, Mich, (type coll. Mich. Agric. Col.). 



This might be taken for M. scndatifrons Cress., from Mexico, but 

 differs decidedly in the structure of the two basal segments of the 

 abdomen. The Mexican species has the basal segment long, flat, 

 narrow and loosely connected with the second, while this species has 

 the basal segment quadrate, oval above, and with only an apparent 

 immovable suture between segments 1 and 2. 



9Ietoi>iu!<i xantliosti$>;ina Ashm., Proc. U. S. Xat. Mus.. xii, 438. 



% . — 13 mm. Black, with face, except central oblong spot, scape beneath, hu- 

 meral line, spot beneath tegulge, apical half of scutellum, most of metapleurse, 

 large apical corners of the two basal segments of abdomen and broad apical mar- 

 gins of the following segments, four anterior tibise and tarsi, apex of all femora 

 and base of hind tibiee, yellow ; posterior tibiae and tarsi reddish brown ; wings 

 yellowish fuscous, stigma yellow, veins brown. 



Type from N. Carolina (coll. U. S. Nat. Mus.). 



Mef-opius polliuctorius S&j (Peltastes), LeConte edition ii, 700. 



J . — 13-16 mm. Black ; yellow markings of varying width on the facial shield 

 and extending above on the orbit, scape beneath, line in front of tegulse, apex 

 of scutellum, two dots on postscutellum, dot on pleurse of metathorax. four ante- 

 rior tibiae at base, four posterior trochanters and femora at base, apex of ab- 

 dominal segments 1, 3, 4 and 5, and apical corners of 2; antennae and four ante- 

 rior legs piceous; wings pale fuliginous, costal margin reddish brown; basal 

 segment of abdomen with the two tubercles but slightly separated, segments 3-6 

 with a more or less distinct central carina. 



'^ . — The two males before me vary in having the entire facial shield, labrum, 

 mandibles, palpi, spot on mesoijleura. four anterior legs, stripe on front of poste- 

 rior tibiae and margin of the sixth abdominal segment yellow. 



Five females and two males from Illinois, Massachusetts, New 

 Jersey, Michigan, New York and Pennsylvania. 



Jletopius nevadeiisis Cress., Proc. Ent. Sec. A. N. S., 1879, xxvii. 

 M. edwardsii Cress., Proc. Acad. Nat. Sci. Phil., 1878, 367. 

 '^ 9. — This western species differs from pollinctorius only in having the ter- 

 minal abdominal segment more or less yellow at apex and all the segments more 

 broadly yellow on apical margin ; in having all the tibiae, basal part of tarsi and 

 line along the front of the four anterior femora and trochanters yellow and wings 

 yellowish fuscous. 



