8 HYMENOPTERA OF AMERICA. [PART 1. 



This fine insect was discovered by W. J. Howard, and described 

 by E. T. Oresson. Numerous individuals were taken by Hidings 

 in Colorado Territory on a plant allied to Lobelia. 



2. m. zonalis Creps. — Nigra, fusco-hirta; antennarum articulis 4, 5 



brevibus; clypeo aroaatim emarginato; thorace parum depresso; 



suatello carinato; metauoto utriuque canthum compressnni longe Bpi- 



' dos am efficiente ; eorpore valde sulfureo-variegato ; abdomiue fasciis 



uompletia ; auo bimacalato; alis subferrugineis. 9 • 



M. zonalis Cbbssok, Proc. Ent. Soc. Philad. Ill, 1864, 674, 2. $. %. 

 9 . Total length 15 mill. ; wing 8-9 mm. 



9. Clypens notched in arc of circle, convex, finely punctured. 

 Labium triangular, rounded at tip, pubescent, with fulvous 

 hairs. The whole insect very finely sculptured. Thorax but 

 little depressed. Metathorax flattened behind, but not depressed ; 

 the angles compressed into strong carinas, armed on each side 

 with a long spine, as in 31. vespoides. 



Black, with brown hairs. Antennas fulvous; scape black, with 

 a yellow spot ; 2d joint black ; 3d yellow ; those following very 

 short; the club blackish above. Mandibles, a spot in the fore- 

 head, the whole orbits, the hind margin of prothorax. and (partly 

 or completely) the fore margin, a spot under the wing, tegulae, 

 post tegulae, margin of scutellum and the angles of metathorax, 

 sulphur-yellow. A complete and regular submarginal fascia on 

 all the segments of the abdomen ; beneath, only lines of maculae ; 

 fith segment above, with two yellow spots. Feet black at base, 

 yellow from the knees to the end. Wings as in the preceding, 

 with ferruginous veins; radial cell rather brown; 1st recurrent 

 vein inserted nearly at the inner angle ; the 2d about in the 

 middle of the 2d cubital cell. 



Var. A yellow spot on the clypeus ; 2 spots on the forehead ; 

 antennae more black; a yellowish tip on the coxae. Fascia? of 

 the abdomen a little emarginated ; the band of the 6th complete. 



%. A larger subquadrate spot beneath the insertion of the 

 antennae, and the clypeus and labrum pale yellowish-white. 

 Clypens shaped like that of 31. vespoides %, but more flattened 

 and less deeply emarginate at tip ; antennae rather longer than 

 head and thorax, proportioned as in Vespoides %, except that 

 the club is not at all flattened beneath ; the joints pale yellowish- 



