THE GENUS MONODONTOMERUS — GAHAN 475 



Algonquin, 111., collected by C. F. Baker and bearing- his note No. 

 3845. 



As will be seen fi-om the cited sjmonymy, the species has been con- 

 fused in literatme, at least ia one instance, with montivagus. It is 

 possible that other published recoi'ds may also refer to this species. 



10. MONODONTOMERUS BAKERI, new species 



Most closely resembles emarginatus but may be distinguished at 

 once by the nonemarginate third tergite as well as by other characters 

 pointed out in the remarks following the description of emarginatus. 

 Also resembles montwagits but difi'ers by having a longer malar 

 space, by the absence of a malar groove, by the more convex face, by 

 the longer ocellocular line, and in the purplish color of the pronotum 

 and prescutum. 



Female.- — Length 4.7 mm.; ovipositor 2.4 mm. Head bluish green, 

 tinged with purplish on vertex; thorax bluish green, pronotum and 

 prescutum strongly tinged with purple and with some purplish tints 

 on pleura; coxae concolorous with thorax, with some purplish tints; 

 posterior femora metallic bluish, slightly diluted with testaceous, 

 median and anterior femora brownish testaceous; all tibiae and tarsi 

 testaceous; wings hyaline with a weak infuscation at stigmal vein; 

 antennal scape and pedicel dark brownish tinged with metallic, the 

 extreme base of scape testaceous; flagellum brownish black; mandibles 

 testaceous; abdomen brownish black, with weak metallic and viola- 

 ceous reflections. 



Head appearing rather thick anteroposteriorly, the temples less 

 strongly receding than usual; eyes practically bare; ocellocular line 

 nearly twice as long as diameter of a lateral ocellus; malar space equal 

 to a little more than half height of eye; malar groove entirely absent; 

 face below antennae distinctly swollen, especially convex medially; 

 mandible with the two ventral teeth subequal; clypeus not protruding; 

 antennae inserted a little below a line connecting lower extremities of 

 eyes; scape not quite attaining level of anterior ocellus; pedicel about 

 one and one-half times as long as broad; ring joint large, about twice 

 as broad as long; first funicular joint subquadrate, following joints of 

 funicle all a little broader than long; club not thicker than funicle and 

 a little longer than two preceding joints combined. Integument of 

 head rather strongly and nearly uniformly shagreened but with a 

 smooth area along posterior orbit at lower extremity of eye. 



Thorax inclusive of propodeum about twice as long as broad, 

 strongly shagreened, the rugulae on mesoscutum and scutellum inter- 

 mingled with numerous shallow pits or punctures; scutellum longer 

 than broad, reticulately sculptured behind transverse groove, the 

 punctate marginal groove- continuous around apex; postscutellum 

 faintly sculptured and with a delicate carina in middle; propodeum 



