444 Mr. E,. E. Turner on Fossorial Ilymenoptera. 



base of the clypeus by a distance almost equal to the com- 

 bined length of the second and tliird joints of the flagellum. 

 Thorax very ch)sely punctured ; median segment more 

 deeply punctured than the thoraK, without an impressed 

 median line, clothed with short, erect, black hairs. First 

 dorsal segment finely and rather closely punctured, the four 

 following segments more closely punctured ; sixth dorsal 

 segment with very sparse and large setigerous punctures, 

 narrowly truncate at the apex, the lateral margins near the 

 apex distinctly carinate. Basal joint of the fore tarsus with 

 seven spines. 



Hah. Yapi, Gold Coast [Simpson). 



This may be distinguished from all other species of the 

 iridentatus group with similar colouring of the wings by the 

 black hairs of t!ie median segment. From fenestratas, !Sm., 

 vv^hich occurs in the same district, it is also distinguished by 

 the puncturation of the first dorsal segment, by the very 

 different sculpture of the sixth dorsal segment, and colour- 

 differences. Tiie colour of the abdomen separates it from 

 poecilopterus, Handl., mionii, Guer., and amoenus, Sm. Tlie 

 sculpture of the sixth dorsal segment seems to be peculiar to 

 this species, all other allied species having that segment 

 much more closely punctured. 



Stizus klugii, Sm. 



Larra apicalis, Klug, Symb. phys. tab. xlvi. fig. 13 (1845). $. 

 Larra kliigii, Sm. Cat. Hym. B.M. iv. p. 345 (1856). 



A female specimen from Magadi Junction, British East 

 Africa, has the two apical dorsal segments yellow-brown, 

 with the sides of the third and fourtli segments and a spot on 

 each side near the apex of the second segment yellow. I 

 look on this as a colour- variety only, though it may possibly 

 be of subspecific importance. 



Subfamily LAJRitiNjs, 



Tachytes admi?'abilis, sp. n. 



$ . Nigra ; f route argenteo-piibescente, abdomine segmentis dor- 

 salibus aureo-pubescentibus, area pygidiali fasco-aureo-setosa ; 

 alis anticis infuscatis, posticis subhyalinis, venis nigris. 

 Long. 23 ram. 



? . Clypeus scarcely convex, the apical margin almost 

 transverse, very finely and closely punctured, with a few 

 large scattered punctures, clothed with short silver pubes- 



