No. 22.] HYMENOPTERA OF CONNECTICUT. 117 



of hind tibiae and their tarsi, bases of hind coxae, and a 

 small spot beneath anterior wings, infuscated; stigma, costa, 



and veins at base, hyaline. Length 6 mm affinis 



Median fovea circular, not extending over bases of antennae; 

 antennae with third and fourth segments subequal; saw- 

 guides straight and oblique above, convex below, con- 

 vexly rounded at apex to a blunt point above; body 

 luteous, with a spot above the bases of antennae, around the 

 ocelli, a broad band on median lobe of mesonotum, a nar- 

 row band on each lateral lobe, an oblique band at their 

 apices, apex of scutellum, all sometimes rufous, postscutel- 

 lum, metathorax in part, basal plates, a spot on middle of 

 first abdominal segment, apices of posterior tibiae, and 

 posterior tarsi, black; stigma luteous, veins brownish. 



Length 8 mm ruf ocinctus 



9. Stigma very narrow and acuminate; head and thorax with 

 long, dense pubescence; ocellar basin rather indistinctly 

 defined; frontal crest long and unbroken, median fovea 

 triangular; saw-guides short, tapering, obtusely pointed; 

 body black, with tips of clypeus, mouth-parts, angles of 

 pronotum, tegulae, tip of abdomen except saw-guides, and 

 outer half of femora, reddish yellow; tibiae pale yellowish; 

 tarsi infuscated; pleurae with a reddish mark. Length 8 



mm pubescens 



Stigma broad and rounded beneath; head and thorax with 

 short, inconspicuous pubescence; ocellar basin distinct, 

 with sharp lateral walls; frontal crest not prominent and 

 unbroken; median fovea oval; saw-guides short and taper- 

 ing; body black, with labrum, angles of pronotum, tegulae, 

 tip of abdomen, venter in great part, and legs, yellowish 

 or reddish; bases of coxae and of femora infuscated. 

 Length 8 mm montivagus 



10. Tergum of abdomen reddish yellow; head and thorax 



strongly punctate; ocellar basin with prominent, elevated 

 ridges; frontal crest prominent and unbroken; saw-guides 

 broad and truncate; body black, with posterior orbits, 

 and notum in part including the scutellum, reddish ; supraclyp- 

 eal area^ tip of clypeus, labrum, pronotum, tegulae, legs, 

 and abdomen, reddish yellow; tips of posterior tibiae and 



posterior tarsi infuscated. Length 6.5 mm punctulatus 



Tergum of abdomen black or brown 11 



11. Femora entirely pale 12 



Femora wholly, or at least some of them in part, black 13 



12. Head and thorax black; body black, with clypeus, labrum, 



collar, tegulae, legs beyond coxae except apex of posterior 

 tibiae and posterior tarsi for the most part, and venter of 

 the abdomen, white or luteous; head distinctly punctate; cly- 



