14 ROBERT NEWSTEAD A REVISION OF THE TSETSE-PLIES (GLOSSINA), 



side and the armature extended liy the pressure of the brush in the same way as 

 when a dorso-ventral mount is required, as if the abdomen is flattened dorso- 

 ventrally in the first instance, it is a most difficult matter to flatten it in the 

 opposite direction subsequently. 



Caution. — Do not use a brush of any kind to manipulate the preparation while 

 it is in the potash — the hairs will shrivel in this re-agent. 



Synopsis of the Species of Glossina. 



Group I (Fusca Group). Large species, length exclusive of proboscis 

 10|-12 mm, 



A. Thorax with the usual longitudinal markings more or less distinct. 



Palpi relatively long and thin. Thorax russet brown, markings distinct, 

 areas enclosed by the curved lines becoming gradually paler out- 

 wardly. Third segment of antennae clothed with very short 

 pubescence. Harpes of male with a strongly serrated margin ; 

 median process not extending beyond the inferior claspers. 



1. fusca, Walk., p. 15. 



Palpi as in 1. Thorax smoky brown, pale markings sharply and 

 clearly defined. Third or terminal segment of antennae clothed with 

 very long pubescence, and with apex strongly recurved. Harpes of 

 male not serrated ; median process projecting moderately beyond the 

 inferior claspers. 2. nu/rofusca, Newst., p. 17. 



Palpi relatively short and stout. Thoracic markings not very clearly 

 defined. Third segment of antennae with very short pubescence. 

 Median process in the armature of the male more than twice the 

 length nf the inferior claspers ; harpes not serrated, 



3. hrevipalpis, Newst., p. 19. 



B. Thoracic markings reduced to spots. 



Thorax with four (sometimes six) dark brown oval spots, the four 

 larger ones arranged in a parallelogram. Harpes of male clothed with 

 large squamose spines. 4. longipennis, Corti, p. 21, 



Group II (Palpalis Group). Hind tarsi all dark. Length 7-9i mm. 

 Thorax, legs and abdomen spotted. 5. macidata, Newst., p. 22. 



Abdomen very dark brown or blackish brown, with a small median pale 

 triangular area on second segment, extending distally as a very narrow 

 stripe. Infei-ior claspers of male with a long broad stem to the foot-like 

 terminal process : superior claspers straight, rapidly narrowing distally 

 and terminating in a conical point. 6. palpalis, R. D., p. 22. 



Similar to G. palpalis, " but browner and somewhat larger . . . pale 

 area on second segment broad and more or less quadrate or irregular in 

 outline , . . dorsum of seventh abdominal segment , . . often 

 cream-buff"."* Superior claspers of male with a terminal tooth-like 

 extension one-third the length of the clasper. 7. calicjinea, Aust, p. 23. 



* Austen, Bull. Ent, Kes., I., p. 294 (1910). 



