568 PROCEEDINGS OF THE ACADEMY OF [Aug., 



red, knees and anterior femora in front pale yellow; anterior femora 

 with a black spot at base behind, the other femora largely black behind ; 

 wings tinged brownish, stigma dark red; second submarginal cell tri- 

 angular, very broad below, greatly narrowed above, third submarginal 

 cell narrowed about half above; basal nervure ending distinctly 

 basad of trans verso-medial ; abdomen with yellow bands ; bases of the 

 segments black, apical margins of the first four broadly ferruginous; 

 on the third and fourth segments laterally are obscurely indicated 

 lateral spots next to the ferruginous; yellow on first segment abruptly 

 cut in the middle by black, that on the second segment greatly nar- 

 rowed by a ferruginous backwardly projecting tongue; apical plate 

 slightly notched; venter red (even to base) speckled with yellow, the 

 yellow forming a curious pattern on the third segment . 



Hab. — Santa Clara county; Cal. (Coquillett). In U. S. Nat. Museum. 

 It is a little uncertain whether this is a Xanthidium or a Nomada s. str. 

 It resembles N. modocorurn, Ckll., from Oregon, but is easily distin- 

 guished by its much narrower, more parallel-sided abdomen, and the 

 second submarginal cell as described. 

 Nomada i Xanthidium i ashmeadi, sp. n. 



? . — Length 10 mm.; black and yellow, not very hairy. Eyes sage- 

 green; face a little broader than long; basal half of mandibles, labrum, 

 clypeus, supraclypeal mark (more than twice as broad as long), lateral 

 face-marks, wedge-shaped mark at top of eyes, and narrow posterior 

 orbits almost up to wedge-shaped mark, all deep yellow; lateral face- 

 marks very broad, their upper margin extending from upper lateral 

 corner of supraclypeal mark obliquely upward (touching antennal 

 socket) to a narrow truncation on the orbital margin about half-way 

 between level of antennae and top of eye ; a fine black line passes down 

 side of supraclypeal mark and upper half of clypeus, ending in a black 

 circle looking like a minute ocellus; antennte stout; scape not swollen, 

 yellow suffused with red in front, black behind; flagellum deep red, 

 first segment with a black basal spot above, last blackish above; third 

 antennal joint about three-quarters length of fourth; thorax coarsely 

 and very densely punctured; upper border of prothorax, tubercles 

 (which are conical -protuberant), tegulse (except an orange-red spot), 

 almost whole pleura, spot before each anterior corner of scutellum, 

 two large patches on scutellum joined posteriorly, postscutellum, two 

 round spots on metathoracic enclosure, two large patches and lateral 

 spots on metathorax, all deep yellow; legs yellow; coxae mostly black 

 behind ; first four femora with a black stripe behind ; hind femora black 

 behind except narrow border and broad apex ; tibiae striped with black 



