1895.] NATURAL, SCIENCES OF PHILADELPHIA. 15 



Abdomen with about equally broad bands of pale yellow and 

 piceous, the piceous bands being at base of 1st, at junction of 1st 

 and 2d, at distal margin of 2d and 3d, at junction of 4th and 5th, 

 and at distal margin of 5th segment. 



Legs primrose-yellow, posterior tibiae and femora more or less 

 fuscous above. Wings hyaline, venation extremely pale; outer 

 margin of 3d discoidal very faint. 



Abdomen beneath entirely yellow, tip tinged with orange. 



Recognized among the species with partly yellow face, by the yellow 

 extending upwards to the level of the anterior ocellus, and the 

 almost entirely yellow legs. The face is practically all yellow. 



Hab. — Las Cruces, N. M., on the College Farm, April 26th. 

 (Ckll., 731.) 



I have ventured to name this and the next preceding after my two 

 little sons, the elder of whom has gone to the undiscovered country. 



Perdita albovittata n. sp. $. 



About 5£ mm. long; head and thorax shining dark indigo- blue, 

 with the white hairs more _ prominent than in sexmacnlata, forming 

 quite a conspicuous white pubescence on cheeks and face. Antennse 

 dark brown, paler, but still dark, towards their ends. Mandibles 

 brownish. Clypeus and a large patch on each side of it ivory-white; 

 clypeus with a blackish mark rather in the form of a horse-shoe, but 

 very faint medially and broadened laterally. 



Head rather sparsely punctate. Thorax very sparsely punctate. 

 Metathorax shiny, not roughened as in sexmacnlata. 



Abdomen piceous, with dense, rather coarse white hairs at tip. 

 1st segment with a deep groove, extending somewhat beyond its 

 middle. 2d and 3d segments each with a broad yellowish- white band, 

 4th with two bauds. Band on 2d segment narrowly interrupted 

 medially ; it is situated along the upper margin of the segment, 

 except at sides, where it bends hindward. Band on 3d segment 

 similar, but only constricted, not interrupted, medially. 1st band on 

 4th segment similar, but only notched medially on its hind margin, 

 broader, and evanescent at sides. 2d band on 4th segment placed 

 along its hind margin, straight, and evanescent at sides; it represents 

 the band of 5th segment pushed forward. 



Underside of abdomen piceous, with pale marks at sides, resem- 

 bling the upper side of abdomen of sexmacnlata considerably. 



