.] Cockerell: New Insects from New Mexico. 



205 



band of light yellow, broken in the middle. Venter very pale yellow without marks. 

 The mandibles are notched within near the end. 



$ . Length about 6.5 mm. The yellow color darker ; flagellum orange beneath. 

 Margin ofstigma and adjacent nervures brownish, marginal cell therefore very dis- 

 tinct. 3d discoidal excessively weak. Face all yellow beneath level of antenns:, ex- 

 cept clypeal dots, and small triangles at junction of clypeus, supraclypeal mark, and 

 dog-ear marks. Supraclypeal mark slightly notched or depressed in median line 

 above, not at all produced upwards. Lateral marks running obliquely from antennal 

 sockets to a point on the margin of the eye, forming an angle of about 45° thereat- 

 Mandibles yellow except tips. Labrum yellow with a dark spot on upper border 

 medially. Prothorax yellow with a dark transverse band. Legs wholly yellow, ex- 

 cept a dark stripe on hind tibi^, and dark last three joints of hind tarsi. Abdomen 

 with five bands instead of four, some presenting square sublateral bulgings on anterior 

 edge, not always obvious. 



Habitat : White Sands by Whitewater, N. M. Many of both sexes 

 found by Prof. Townsend visiting flowers of Bigelovia, October 6th. 

 On the same day we found a purple-flowered Aster at Whitewater 

 visited by P. townsendi, 1 S, 1 9, one P. /a//ax, Ckll., and one F. 

 semicrocea, Cicll. The $ townsendi from the Aster has the abdomen 

 more darkened, so that it might be said to be black with light bands. ^ 

 F. townsendi is allied to P. bigelovia^, but very distinct. The 9 is 

 larger, and the femora are entirely yellow, etc. In my table of Perdita 

 (Proc. Phil. Acad., 1896) it runs down to 77. The $ in the table 

 runs down to 42. ^ bigelovice differs at once from it by the yellow of 

 the face extending above level of antennae in the median line. 



Perdita stottleri, sp. nov. 



9 . About 6 mm. long. Differs from townsendi in its small size, and in hav- 

 ing the front femora with a large black patch behind, the middle femora with a black 

 speck near the end, and the hind femora with the upper hind edge broadly black for 

 the apical three-fifths. The clypeus is hardly so high as in townsendi, and the lateral 

 face-marks run gradually to a point, the angulation being barely perceptible. The 

 supraclypeal spots are present as in townsendi. 



Difl"ers at once from bigelovice by the pale yellow venter of abdo- 

 men, as in townsendi, that of bigelovice being dark brown. The abdo- 

 men above also is marked just as in townseiidi. The femora in bigelovm 

 are all black except at their distal ends, in stottleri only marked with 

 black, in totunsendi without any black. 



Habitat : By Tularosa Creek at the st^re on the edge of the Mesca- 

 lero Reservation, October ist. One specimen on flowers of Bigelovia 

 graveolens wax. glab rata, "^ a few feet withinjhejoundary-line of the 



^rfhe Bigelovia grave^ns var., along Tularosa Creek is very attractive to flies. 

 Prof. Townsend will report elsewhere on those of the families in which he is inter 



