344 Mr. E. E. Austen on the Synovymy and 



fuscous on scutellum ; clypeus produced, but not so exces- 

 sively as in some species, exceedingly shiny, very sparsely 

 punctured ; sides of face covered with white hair ; malar 

 space broader than long; antennse black; front densely and 

 minutely j)unctured ; mesothorax with dense strong punc- 

 tures, but shining ; postscutellum covered with white tomen- 

 tum and white hair in scutello-mesothoracic suture ; area of 

 mefathorax broad, with a raised cancellate sculpture; tegu'a3 

 dark reddish. Wings reddish, stigma and nervures rather 

 dilute brown; second s.ni. very large; third s.m. receiving 

 the recurrent nervures near apex and base ; second and third 

 transverso-cubital straight. Legs black, the tarsi ferruginous 

 at apex. Abdomen black, the hind margins of the segments 

 broadly hyaline, rather sparsely beset with silvery hairs; 

 dark parts of abdomen with much black hair. 



The smallest known species of the genus ; nearest to 

 T. jv'oductum, but malar space shorter, and the sculpture of 

 the thorax very different. 



IJah. Hinterland of Benguella, Jan. 3, 1908 (F. C. 

 Wellman). 



Taken with other bees (CceUo.rys henguellensis &c.) at a 

 small patch of flowering Composita:', Olhonna and Geigeria. 

 Tiie hind legs are loaded with the deep orange pollen. 



Bomhus ephippiafus montezumce, n. n. 



Bomlus Inboi-iosus, Smith, Jouni. of Entom. 1861, p. 1-33 (not of P'abii- 

 cius, 1804).— Mexico. 



LIV. — On the Synonymy and Systematic Position of some 

 Species of Tabanidse described by Thunberg and Lichten- 

 stein. By Ernest E. Austen. 



In a recent paper on the ''Nomenclature of Diptera " Prof. 

 Eezzi * has called attention to certain forgotten writings of 

 C. P. Thunberg and A. A. H. Lichtenstein, and has also 

 {loc. ci't. p. 84) expressed his conviction that, as has already 

 been done in the case of other orders of insects, " a permanent 

 and immutable nomenclature can be established for the 

 Diptera also, alter all generic and specific names, proposed 

 by all the older authors without exception, have been com- 

 jjletely elucidated and interpreted." The following notes are 



* Wien. Ent. Z. xxvli. Jahrg., Heft ii. & iii. (20tli Feb., 1908) 

 pp. 77-83. 



