Mr. R. E. Turner on Fossorial Hymenoptera. 87 



the hind margin of the head as from eacli otlier; front 

 closely and deeply punctured ; vertex smooth and shining, 

 with a few small scattered punctures. Thorax rather 

 sparsely punctured, shining ; the pronotum longer than 

 the mesonotum ; scutellum as long as the pronotum. 

 Median segment broader than long, sparsely punctured, 

 more closely at the base than at the apex, with two carinse 

 very near together converging from the base and almost 

 touching at the apex ; the apical slope rugosely punctured, 

 the sides of the segment rather indistinctly obliquely striated. 

 Abdomen shining, with large scattered punctures ; sixth 

 tergite rather more closely punctured, but without striae. 

 Hind femora produced into a strong spine near the apex 

 beneath; hind tibise serrate; basal joint of the hind tarsi 

 with a row of fine hairs beneath. Second abscissa of the 

 radius very long, much longer than the third. 



Hab. Tero Forest, Uganda (C. G. Goiucley), July 1912. 



Nearly allied to the Oriental E. tricolor, Sm., both in the 

 puncturation and the long second abscissa of the radius ; 

 but differing in the absence of the steel-blue colour on the 

 abdomen, in the somewhat more slender build, in the 

 different form of the clypeus, and in the narrower hind 

 femora with a much more strongly developed spine. Not 

 nearly allied to any otlier Ethiopian species. 



Ells {Mesa) tricolor, Sm. 



Myzine tricolor, Sin. Journ. Proc. Linn. Soc, Zool. ii. p. 91 (1858). 



There are three closely allied forms in the British Museum, 

 probably representing local races of one species. These 

 may be separated by the following key : — 



1. Anterior ocellus very distinctly further from 



the posterior margin of the head than 

 from the antennal tubercles ; scope and 

 three basal joints of flagellum red ; clypeus 

 with a low median carina not reaching 

 the apex ; posterior slope of the median 



segment not concave in the middle E. tricolor longiceps, 



Anterior ocellus as near to the posterior [subsp. n. 



margin as to the antennal tubercles or 

 nearer ; antennas wholly black ; carina of 

 clypeus very prominent or wholly absent ; 

 posterior slope of the median segment 

 slightly concave 2. 



2. Clypeus with a very prominent carina 



ending in a raised tubercle E. tricolor tricolor, Sm. 



Clypeus depressed in the middle, without 



a median carina E. tricolor shuckardi, 



[subsp. n. 



