18 HYMENOPTERA. 



and two impressed lines on each side, touching the posterior, but 

 not extending to the anterior, margin ; the metathorax covered 

 with large shallow punctures and rounded at its lateral margins ; 

 wings dark brown, and having a purple iridescence. Abdomen 

 shining, finely and distantly punctured, its extreme apex slightly 

 ferruginous. 



Hab. Sierra Leone. (The Rev. D. F. Morgan.) 



115. MuTiLLA Pythia, B.M. 



Female. Length 6i lines. — Head and abdomen black, thorax 

 ferruginous ; head coarsely rugose, swollen behind the eyes, the 

 hinder angles rounded ; the margin of the vertex, cheeks, and 

 parts of the mouth have a thin griseous pubescence, the front 

 sprinkled with erect short black hairs. Thorax oblong-quadrate, 

 very coarsely longitudinally rugose ; the lateral margins of the 

 metathorax denticulate; the intermediate and posterior tibiae 

 have externally a double row of short spines, the legs thinly 

 clothed with a pale glittering pubescence. Abdomen thinly 

 clothed with black pubescence ; the three basal segments have 

 on their apical margins a fascia of ghttering yellowish -white 

 pubescence ; the second segment beneath is transversely elevated 

 m the middle and armed with three blunt teeth. 



Hab. Port Natal. 



116. MuTiLLA Cepheus. B.M. 



Female. Length 6 lines. — Head and abdomen black, thorax 

 ferruginous, the head and thorax very coarsely rugose, the head 

 rather wider than the thorax, rounded behind ; thorax oblong- 

 quadrate, slightly narrowed behind ; the legs have a sparing pale 

 glittering pubescence, that on the tarsi beneath brown. Abdo- 

 men longitudinally rugose, the basal segment has on each side 

 an oblique patch of glittering yellowish-white pubescence ; the 

 third segment is covered with pubescence of the same colour in- 

 terrupted in tiie middle. 



Hab. Port Natal. 



117. MuTTLLA Acheron. B.M. 



Male. Length 10 lines. — Entirely black, the eyes emarginate, 

 the head much narrower than the thorax ; the mesothorax having 

 a central longitudinal carina and two shorter ones on each side ; 

 the metathorax widened posteriorly, and having in the middle a 

 longitudinal grooved carina, on each side of which is an irregular 

 reticulation ; wings deep brovni-black, having a violet irides- 

 cence ; the first submarginal cell has a curved transverse hyaline 



