248 ENTOMOLOGICAL NEWS. [June, ’o8 
by the pronotum being dentate laterally, having no yellow on the 
metanotum, etc. While in Ashmead’s table it runs to Cuphop- 
terus Moraw., it does not seem to be closely related to any of 
the species of that group. 
Crabro opwana* n. sp. 
é. Length 7-9 mm. Clypeus rounded on the anterior margin, 
slightly emarginate in the middle, middle carina not very strong but 
still plainly seen; front between eyes from a little above the middle 
of eyes smooth, shining; near the eyes there are a few striz; rest 
of head with large, distinct, well separated punctures; ocelli in a 
triangle; scape wider at apex than at base; flagellum stout, first 
and second joints equal, smooth, without a fringe of hairs; prono- 
tum rather longer than usual, a distinct, slender, sharp tooth at 
anterior corner; (this tooth is stronger in some specimens than 
others); dorsulum, scutellum with large distinct punctures; meso- 
pleurze strongly strio-punctate; mesopectus rather finely punctured; 
episternum and epimeron of metathorax distinctly striated with strong 
strie; metathorax without an enclosure, dorsulum and posterior face 
strongly punctured, the dorsulum more strongly; first joint of hind 
tarsi distinctly longer than the longest spur of hind tibiz; anterior 
femora produced beneath for the entire length, near the base is a 
sharp tooth; (in some specimens there is another much smaller 
tooth near the apex); middle femora produced beneath so that when 
viewed from behind each is somewhat rectangular; posterior femora 
normal; posterior tibize serrated on the outer margin; middle tibize 
not serrated, without spur at apex; first recurrent nervure in apical 
sixth of cell; abdomen strongly constricted between the first and 
second segment, and less so between segment two and three, and 
sometimes three and four; basal segments with distinct, well sep- 
arated punctures, apical segment very finely punctured; venter with 
some well separated punctures. Color black; scape except a spot 
behind, tubercles, sometimes two spots on pronotum, spots on first 
six abdominal segments above, (these spots meet on segments five 
and six, forming a band), apex of anterior and middle femora (the 
yellow on the anterior femora is wider beneath) legs below femora 
except a black spot on four posterior femora within, yellow; hind 
tarsi somewhat infuscated; antennze beneath somewhat testaceous but 
not strongly so. Wings dusky hyaline, apical half a little the darker; 
nervures and stigma dark brown (the stigma in one specimen is 
pale brown.) Clypeus, lower half of inner orbits, lower part of 
cheeks, sides of thorax and pectus with silvery pubescence. 
" * Opwan is the Chippewa (Indiana) word for thigh. Used here on account of the spine 
on the fore femora. 
