Wasps of the Genus Tachytes. 17 
g. Seventh tergite very broadly truncate at the apex ; 
eighth sternite very widely but rather shallowly emarginate, 
the apical angles produced into short acute spines. 
Hab. Uganda Protectorate, Unyoro, Bugoma Forest, 
3700 ft. (S. A. Neave), December; Unyoro, Budongo Forest, 
3400 ft. (S. A. Neave), December. 
Closely allied to 7. hamiltoni, but differs in the colour of 
the legs and wings, and in the greater distance between the 
eyes on the vertex. 
14. Tachytes labilis, sp. n. 
Q. Nigra; tarsis articulis tribus apicalibus subtus, calcaribusque 
. fusco-ferrugineis ; tegulis testaceis; fronte clypeoque griseo- 
argenteo-pubescentibus; thorace segmentoque mediano fulvo- 
pilosis; segmentis dorsalibus 4 basalibus fascia lata apicali 
griseo -argenteo - pubescente; area pygidiali fusco - ferrugineo- 
setosa; alis hyalinis, pallidissime flavo-tinctis, apice pallide 
infuscatis, venis testaceis; galea elongata. 
3. Femine similis; segmento dorsali septimo subargenteo- 
pubescente. 
Long., 2 18 mm., ¢ 15 mm. 
?. Extremely near to 7. prestadilis, but differs in having 
the pygidial area a little more broadly rounded at the apex ; 
and in the colour of the fore legs; the eyes are also a little 
further apart on the vertex. 
6. Seventh dorsal segment broadly rounded at the apex, 
not truncate; eighth sternite narrow, not more than half 
as wide as in prestabilis, shallowly emarginate at the apex, 
the apical teeth blunter than in prestabilis. 
Hab. Nyasaland, Mlanje (S. A. Neave), December to 
February. 
Probably only a geographical race of prestabilis, but the 
difference in the apical segments of the male seems 
important. The male is the type. 
15. Tachytes hamiltoni, sp. n. 
3.‘Niger; fronte clypeoque aureo-pubescentibus ; thorace seg- 
mentoque mediano pallide fulvo-hirsutis, mesonoto lateribus 
pallide aureo-pubescente; segmenutis dorsalibus 5 basalibus 
fascia apicali argenteo-pubescente, pygidio rufo-pubescente ; 
tegulis testucéis; mandibulis basi, femoribus parte apicali, tibiis 
tarsisque ferrugineis ; alis flavo-hyalinis, venis ferrugineis. 
Long. 15 mm. 
Ann. & Mag. N. Hist. Ser. 8. Vol, xx. 2 
