— NEWS. 257 
ow t os paddler tad: caste Ao occ 
es striato-punctate ; strie stronger; middle tibie with apical spur; 
nora rather more robust than usual ; transverse cubitus received a lit- 
middle of radial cell; abdomen shining, impunctate, pygidium 
, rather sharp at apex, bat not excavated, with a few large 
Color black; scape in front, mandibles except apex, 
er tips of anterior femora, anterior tibix, middle tibix except a 
ick spot, base of posterior tibix, basal joint of middle and posterior 
si yellowish; anterior tarsi ferruginous; clypeus, cheeks, thorax at 
) and beneath with silvery pubescence, wings clear hyaline, irides- 
| is fee Wy Crabeo errone Fos, Prosopsis spp., 
ie 2 is Fox's ta table runs between propinquus Fox (Texas) and 
eee Pack. (Eastern States) but there is no median promi- 
ene on the clypeus, and it differs in other characters. 
ez modestam n. sp. 
. Length 5% mm.; anterior wing 4 mm. Head smooth, shin- 
, impunctate; around each lateral ocelli is a depressed area; front 
broken in middle by a line; facial basin rather narrow, shin- 
_ ing; antenne rather slender, pedicellum with tooth beneath, first 
A ~ flagelfular joint emarginate, second produced beneath, remaining simple, 
__ pale at base; clypeus strongly produced medially, sides of this pro- 
fs _ jection with small teeth, in middl ee sel pronotum 
. _ founded; dorsulum with very fine punctures; meso-pleure almost im- 
yay 
Tit 
wanting; suture of metathorax strong; meta- 
wi ee Se ieee oe posterior four tro- 
___ hanters elongate; femora robust, especially the anterior pair; pos- 
_____ terior tibie enlarged at apex; venation normal for genus; abdomen 
+ as usual in this genus. Color shining black; clypeus somewhat and 
{ antenne piceous; scape beneath, tubercles, apical half of coxzx, tro- 
chanters, apex of four anterior femora, their tibie except a black spot 
four tarsi, base of posterior tibix yellow; tegulx, apex 
pex of abdomen brownish-red; clypeus and lower 
silvery pubescence; wings clear hyaline; iridescent; 
i 
a 
Habitat—RBoulder, Colo., May 30, 1906 (T. D. A. Cockerell). 
Rhopalum Kby.—group pedicellatus: Fox. This agrees 
vee Coma this genus. The following table will separate the 
species of this genus in the male sex. 
