Sees from Neto \fe,rico. 411 



Anthidiiim Porterte^ sp. n. 



(^ . — Length about 1.") inilliin. 



Kobiist (breadth of abdomen 5^ milliin.) ; black, with wliite 

 pubescence, j»alc ochraccous on mesothorax, scutclluni, and 

 vertex. Markiiif^.s pale lemon-yellow ; cly|)ciis yellow ; 

 wedge-shaped lateral face-marks, (Miding at the level ot" the 

 lower part of antennal sockets, mandibles (excej)t their bi- 

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

 mesothorax in front, mark on tegula3, stripe above tegulie, 

 four oblong marks on scutellum, stripe on anterior tibia, 

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

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

 abdomen \n\\e 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 

 tigured by Cresson for A. viornionum, excej)t that the lateral 

 lobes are broader and less curved inwards. Last ventral 

 segment with a single large ferruginous si)inc, black at tip. 

 h?cape 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 blotclies 

 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 diflierent from the 

 female of cognatum^ which, however, is easily distinguished 

 in the male. 



Hah. Las Vegas, Aug. 11, 1890, at flowers of Petalo- 

 stemon candidus, 1 (^ (Wi'lmatte Porter) ; also in the Mesilla 

 Valley, Aug. 28, at flowers of Cevallia sinuata, ($ {C'klL), 

 and Mesilla, June aO, ? {Ckll.). 



This is what I have hitherto recorded as A. inaculij'rons, 

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

 Uniortunately maculifrons 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 

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

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

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

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

 any material irom the llocky Mountains, and it is most likely 

 that his insect came from the Southern States. 



