CAMERON, POSSOKER. 233 



occupying about one fourth on the 2nd, occupying more on the following until, on the 

 last, it covers the whole segment; the wings are clear hyaline, with pale testaceous 

 nervures; the apical abscissa of the radius is roundly curved, projects largely beyond the 

 cubital, and is almost as long as the basal 2 united. The black mark on the dypeus 

 is large and is not much narrowed above; the basal half of the mandibles is yellow, 

 the apical rufous. 



Looks like a small form of <'n\u>tt(x but should be known by the apical abdominal 

 bands being much narrower and of equal width, the basal bands not being dilated in 

 the centre as they are in < rimmtus, the basal abdominal segment is entirely black, the 

 pubescence is less dense and the apical abscissa of the radius is longer. SAUSSURE and 

 SICHEL (I. c.} slate that the abdominal bands in collar-is may be red. 



Tipliiidae. 



This group appears to be well represented in East Tropical Africa, not only as 

 regards the number of species, but also in respect of the number of specimens of the 

 individual species. The following table may aid in the identification of the species taken 

 by Prof. SJOSTEDT. 



1 (8) Lugs more or less red. 



2 (5) Femora red. 



3 (-i) Wings fuscous violaceous, the antenna; black; length 15 mm. SjHsiedti. 



4 (3) Wings hyaline, the antennae red; length 9 10 mm. massaica. 



5 (2) Femora black. 



(7) Metanotal area not narrowed towards the apex, the collar not keeled, the oral region red. 



erythrostoma. 



7 (6) Metanotal area narrowed towards the apex, the collar stoutly keeled, the oral region black. 



carinicollis. 



8 (1) Legs black. 



9 (10) Wings fuscous violaceous; length 13 14- mm. tinctipennis. 



10 (9) Wings hyaline, length under 12 mm. 



11 (1-i) Metanotal area transversely striated, the petiole long, pyriform ; length 6 8 nun. 



12 (13) The metanotal area of equal width, its central keel not reaching to the middle; length 8 mm. 



marginicollis. 



13 (12) The metanotal area narrowed Inwards the apex, its central keel reaching to the apex; length 6 mm. 



meruensis. 

 li (11) The metanotum area not striated; length over 12 mm.; the petiole not long, pyriform. 



15 (16) Metanotal area i times as long as wide, mandibles red, tegulse black. aetJiiopica. 



16 (15) Metanotal area not much more than twice as long as wide; tegulse fuscous in part. Mandibles black. 



17 (18) Apical branch of radius rounded, not projecting beyond the cubital cellule, a large mark in the 



centre of the innerside of tegulse ; central metanotal keel distinct, a distinct ridge on top of apical 

 slope of abdominal petiole. pilosella. 



18 (17) Apical abscissa of radius angled, distinctly projecting beyond Hie cubital cellule, a black mark on 



tin- base of teguhc imlv, central keel on metanotum indistinct; no distinct ridge on petiole. 



kilimandjaroensis. 



SjiisMts KHim<uiiljiiro-Mtni. /.'.//,//'//<. 8. 30 





