Bees from New Mexico. 411 



Anthidium PortercBj sp. n. 



S . — Length about 15 millim. 



Eobust (breadth of abdomen 5^ millim.) ; black, with white 

 pubescence, pale ochraceous on mesothorax, scutellum, and 

 vertex. Markings pale lemon-yellow ; clypeus yellow ; 

 wedge-shaped lateral t'ace-marks, ending at the level of the 

 lower part of antennal sockets, mandibles (except their bi- 

 dentate tips), oblong spot above eyes, mark on each side of 

 mesothorax in front, mark on tegul^, stripe above tegulse, 

 four oblong marks on scutellum, stripe on anterior tibia, 

 interrupted stripe on middle tibia, spot at base of hind tibia, 

 basal joint of middle and hind tarsi, and interrupted bands on 

 abdomen pale yellow. The abdominal bands are interrupted 

 in the middle and broadly notched on each side in front, on 

 the first two segments completely divided, on the sixth 

 segment scarcely notched. Apical segment ferruginous, as 

 figured by Cresson for A. mormonum, except that the lateral 

 lobes are broader and less curved inwards. Last ventral 

 segment with a single large ferruginous spine, black at tip. 

 Scape with a yellow stripe ; labrum black. Wings broadly 

 dusky on outer margin ; second recurrent nervure joining 

 second submarginal cell at its tip. 



$ . — Length about 12 millim. 



Marked much like the male, but clypeus black, with a 

 large pale yellow blotch on each side anteriorly, the blotches 

 uniting briefly on the anterior margin ; femora and bases of 

 abdominal segments more or less ferruginous ; scape entirely 

 black ; ventral scopa white. Hardly at all different from the 

 female of cognatuniy which, however, is easily distinguished 

 in the male. 



Hab. Las Vegas, Aug. 11, 1899, at liowers of Petalo- 

 stemon candidus, 1 ^ ( Wilmatte Porter) ; also in the Mesilla 

 Valley, Aug. 23, at flowers of Cevallia sinuata, ($ {CklL), 

 and Mesilla, June 30, ? {CklL). 



This is what I have hitherto recorded as A. maculijrons, 

 Smith, and 1 believe it is the species so identified by Cresson. 

 Unfortunately macuUfrons was described only from the 

 female, and as there are several similar females known in this 

 group, associated with males which have excellent characters 

 at the apex of the abdomen, it may be impossible to certainly 

 identify Smith's species. However, so far as Smith's descrip- 

 tion goes, it points to A. montivagum, Cress., rather than to 

 the present insect, the size being quite too small for A. Por- 

 terce. It is not known or believed, however, that Smith had 

 any material from the Eocky Mountains, and it is most likely 

 that his insect came from the Southern States. 



