G. TACHINOIDES : SYNONYMY AND AFFINITIES. 47 



than in the case of G. palUdi})es (compare Figs. 6 E and G i), 

 p. 7), though the perfect insect of the latter is of course a 

 much higger fly than G. fachinoides. In the present species the 

 tumid lips are just under 1 mm. in length, and the notch 

 between them is similar in shape to that between the lips of the 

 pupa of G. inorsttans, although not so narrow (compare Figs. 6 E 

 and 6 r, p. 7). The notch is much wider than, and has not 

 the characteristic shape of that exhibited by the pupa of 

 G. jmlpalis (compare Figs. 6 E and 6 f, p. 7). 



Synonymy, Affinities, and Distinctive Characters. 



The identity of Glossina decorsei, Brumpt, with G. tachinoides, 

 Westw., was proved by the examination of specimens belonging 

 to the original series of G. decorsei, kindly submitted to the 

 author by Dr. Brumpt.* 



G. tachinoides, which, besides being one of the smallest, is 

 also one of the most easily recognised members of its genus, is 

 readily distinguishable from the other species of the G. j)alpalis 

 group, to which it belongs, owing to the colouration and markings 

 of its abdomen, in which respects it presents a closer resemblance 

 to G. palUdirpes, Austen, or G. longipalpis, Wied., than to any 

 species of its own group. The characteristic shape of the median 

 pale area on the second abdominal segment, to which attention 

 has already been drawn, will however at once enable G. tachinoides 

 to be distinguished from any species of the G. moisitans group, 

 even though the hind tarsi be missing. 



* Cf. E. E. Austen, " Supplementary Notes on the Tsetse-Flies (Genus 

 Glossina, Wiedemann) " : a Paper read in the Section of Tropical Diseases 

 at the Annual Meeting of the British Medical Association, Oxford, July, 

 1904 : British Medical Journal, September 17, 1904. 



