230 Messrs. T. D. A. Cockerell and E. Atkins on 



Hah. Pampa Aullaga. Alt. 3700 m. 



Type. Female. B.M. no. 2. 2. 2. 81. Original number 

 1G42. Killed 21st October, IDOL 



The specimen from Sevaruya, a place I fail to identify, but 

 not on the Pampa Aullaga, is rather darker than the Pampa 

 ones, representing an intermediate colour between those and 

 the typical Sahama series. 



]7. Marmosa elegans, Waterh. 



2 ^,4: ? . Challapata, 3700 m. 

 c? ? . Sucre, 3000 m. 



XXXIX. — Conirihufions from the New Mexico BioJofjical 

 Station. — XII. On some Genera of Bees. By T. D. A. 

 Cockerell and Emerson Atkins. 



The family Stelidse of Ashmead consists of a series of para- 

 sitic bees which can hardly be grouped together in a classifi- 

 cation based on actual blood-relationship. The subfamily 

 Stelidinje appears to be an offshoot from the Anthidiinje ; 

 while it has been suggested that the other subfamily, Coeliox- 

 inje, is similarly related to the Megachilina3. TheCoelioxina3, 

 however, appear to be a composite group, Coelioxi/fi and its 

 allies being close to Megachile, while tlie genera witli 4- to 

 6-jointed maxillary palpi must be referred to quite another 

 series. 



Dioxys [11 opiopo sites) 2>'>'oducta, var. suhruhra (Ckll.). 



Labial palpi. — 1 * longer than 2 ; 3 + -4 less than half length 

 of 2. 



Maxillary palpi. — Apparently 2-jointed ; 1 oval, much 

 longer than broad, 2 minute. There is presumably a basal 

 tubercle, representing the true first joint, so that the palpi 

 are properly 3-jointed. 



Galea. — Slender, falciform, with transverse striaj ; inner 

 margin ciliate. 



Mr. Ashmead states that JJoplopasites is distinct from 

 Dioxys, but no distinctive characters have been pointed out, 

 nor have we found them. 



The transverse striae on the galea are noteworthy, as they 

 do not occur in the supposedly allied genera Coilioxys &c., 

 but do occur in Ileriades and Chelostoma. 



* In this paper the figures in the di'scriptions of the palpi are to bo 

 understood to refer to the joints: thus, 1 = first joint. 



