356 Mr. T. D. A. Cockerell — Descriptions and 



Northern Nigeria : R. Benue, between Bagana and Lokoja, 

 March, 1907 (Dr. G. J. Pirie). 



The collector's field-note attached to the type is as 

 follows : — 



" Caught on a sand-bank in the evening, while we were 

 sitting out by lamp-light : bit a European/' 



The present species may be distinguished from the fore- 

 going (Rh. concinna, Austen) by the absence of markings on 

 the thorax and of a dark transverse band on the first 

 abdominal segment, as also by the band on the second (as 

 well as that on the third) abdominal segment being inter- 

 rupted in the middle line ; as regards the wings, the markings 

 in the distal half are darker in Rh. stimulans than in 

 Rh. concinna, while the transverse band is narrower, and 

 the apical blotch reaches the posterior branch of the third 

 longitudinal vein, instead of terminating a little before the 

 middle of the second submarginal cell. 



Rhinomyza stimulans is closely allied to a new species of 

 the same genus found in Southern Nigeria, of which a ? 

 from Agbabu, S. Nigeria, 23. iv. 1909 (Dr. Hanningtori), is 

 in the possession of the Liverpool School of Tropical 

 Medicine. Apart from its larger size (length 13*5 mm., 

 wing-expanse 26*3 mm.), the Liverpool specimen is dis- 

 tinguished by its darker colour (dorsum of thorax mummy- 

 brown), dark brown antennas, shorter and stouter first 

 antennal joint, second antennal joint having its upper angle 

 much more produced (continued into a long point), and, in 

 the wing, by the brown blotch in the tip of anal cell 

 extending to the hind margin and filling up rather more 

 than the distal third of the axillary cell. In the shape of 

 the frontal callus, general pattern of the wing-markings, 

 and general shape and extent of the dark bands on the 

 abdomen the two species are alike. 



XXXIX. — Descriptions and Records of Bees. — XXX III. 

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



Callomelitta turnerorum, sp. n. 



? . — Length about 1\ mm. 



Thorax, legs, and abdomen entirely bright rufo-fulvous ; 

 head black, with the lower margin of clypeus, labrum, and 

 the bidentate mandibles ferruginous ; antennae fulvous, the 



