NORTH AMERICAN HYMENOPTERA. 
63 
and shilling, sparsely and finely punctured, clothed with long, thin, dirty white 
pubescence; scutellum very coarsely punctured in comparison with mesothorax; 
metathorax with a single series of suhquadrate pits, lateral faces of posterior 
plate shining, hardly reticulated ; wings hyaline, nervures and stigma dull 
honey-yellow, tegulte hlack; legs slender, tarsi dull ferruginous; abdomen shin- 
ing. sparsely and very finely punctured, more closely on second segment, base 
of first segment with rather long pale pubescence, apical margins of segments 
1-5 with fascise of thin whitish pubescence. Length 7 mm. 
One male, taken June 21st, on flowers of Apocymmi ccmnabinum. 
SPHECODES. 
S. itutoiiiiariie 9. — Black, clothed with thin pale hairs; head broader 
than thorax, closely and minutely punctured ; mandibles unarmed, honey-yellow, 
rufous at tips; aiitenn® dull ferruginous, flagellum paler beneath, mesothorax 
shining, with a slight greenish reflection, sparsely and finely punctured ; disc of 
metathorax with several elevated longitudinal lines reaching nearly to apex, 
which, with the posterior face, is smooth and shining; wings hyaline, nervures 
dull ferruginous, only two submarginal cells, but there is a faint indication of a 
small second submarginal, tegulse pale testaceous; legs dull ferruginous, growing 
paler towadrs the claws ; abdomen shining, entirely ferruginous yellow. Length 
5 mm. 
Two females, taken April 18th, on flowers of Antennaria planta- 
gimfolia. 
In the left wing of each specimen the first transverso-cubital ner- 
vure is represented by a stump of a vein, and specimens may yet be 
found in which that nervure is entire, making the normal three sub- 
marginal cells. I have two specimens of S. mandihularis Cress, 
whose wings show only two submarginal cells. In one the first 
transverse cubital is represented by stumps, while the other specimen 
shows no trace of it. 
MACROPIS. 
steiroiiematis 9 • — Coarsely and closely punctured, a raised line from 
anterior ocellus terminates in a carina between base of antenufe; base of meta- 
thorax extending narrowly on hind plate to insertion of abdomen, and trunca- 
tion of abdomen, smooth, shining and impunctate; hind plate of metathorax 
sparsely punctured; abdominal segments depressed at base and apex. Black; 
flagellum dull testaceous beneath; tegulse piceous; wniigs somewhat dusky, 
nervures black ; pubescence on face, vertex, cheeks, pleurte, scutellum, sides of 
metathorax, femora beneath, base and apical margin of second, apical margins 
of succeeding, and sides of all segments of abdomen, rather long and white, the 
pubescence of fifth segment is more abundant and interrupted with blackish in 
middle; disc of mesothorax with rather thin blackish pubescence; the tibife 
with pale pubescence, most dense and whitest on hind pair; pubescence of tarsi 
brownish, most dense and blackest on hind pair. Length 9 mm. 
. — Resembles the female, but is more strongly pubescent, the pubescence of 
legs more uniformly whitish, the tarsi fulvous beneath ; the face below antennse. 
