220 Mr. T. D. A. Qod<i%v(i\\—Descnj)tions and 



Dimensions of the type (measured in the flesli) : — 



Head and body 135 mm.; tail 170; hind foot 32 ; 

 ear 18'5. 



Skull : greatest lengtli 3S'6 ; basilar lengtli 29*5 ; 

 condylo-incisive length 33"5 ; zygomatic breadth 19'6 ; 

 interorbital constriction 6'8 ; squamosal breadth of brain- 

 case 16*4; palatilar length 17'5 ; length of palatal fora- 

 mina 6*5 ; alveolar length of upper molar series 6 ; length of 

 upper molar series 5*5. 



Hub. Baringo, British East Africa. Altitude 4000 feet. 



Type. Old female. B.M. no. 10. 12. 19. 15. Original 

 number 1383. Collected by Mr. Hobin Kemp on October 

 13th, 1910. Presented to the British Museum by Mr. C. D. 

 Eudd. 



This Baringo gerbil appears most nearly related to the 

 Somali species, 2\ pliillipsi, as is clearly shown by the simi- 

 larity between the skulls of the two forms. The external 

 colour-difference is however so marked that it is necessary 

 to consider the Baringo specimen as representing a distinct 

 dark-coloured race of pJiilippsi. In general colour this new 

 form most nearly approaches T. dundasi, a species described 

 by Wroughton from Mt. Elgon ; but umbrosa does not 

 appear to be in any way closely allied to the Elgon gerbil, 

 which is a very much larger animal, with a skull 45 mm. in 

 length. 



XXII. — Descriptions and Records of Bees. — XLII. 

 By T. D. A. CocKEKELL, University of Colorado. 



Megachile cetera, sp. u. 



? . — Length about lOi mm. 



Black, with white and black hair, the broad abdomen 

 with distinct white hair-bands. In nearly all respects like 

 M. quinqaeUneata, Ckll., but the mesothorax and scutellum 

 are minutely and densely rugoso-puuctate, the tegulre are 

 rufo-fuscous, and the hair on the inner side of the tarsi is 

 clear ferruginous. 



Hab. Nagambie, A'ictoria, 1910 {French) ^iy-^e; Gipps- 

 land, Victoria {Froyfjatt) ; Sydney, N.S.W., one from 

 F. Smith's collection, erroueouslv labelled M. niaculata, 

 Smith; near Cooma, N.S.W., Jan.' 10, 1903 {Sc/hr). 



The specimen from near Cooma has no black hair on 



