532 Mr. G. A. K. Marshall on 



H. Group triih Black and Yellow-Banded Bodies: all 

 Hymenoptera (Represented on Plate XXIII). 



ScoUadie. Pompil ids:. Ichneumonicla:. 



Myziue capitata Pompilus festivus Metopius discolor 



(tig. 35). (tig. 34). (tig. 36). 



In Europe, owing to the predominance of the genus 

 Vcspa, black and yellow bands constitute a very dominant 

 type of coloration among the Hymenoptera ; but in 

 Mashonaland (where Vespa is entirely absent) this pattern 

 is of comparatively rare occurrence, and, except in the case 

 of one large Scolia and some Bemhex, is confined to small 

 insects. The two Aculeates in the above group are 

 common frequenters of flowers, and to them might have 

 been added several small species of Bli>;, etc. ; tlie Ichneu- 

 mon is common in woods. 



I. Group loith Darh Wings and Black-and- Yellow Legs: 

 Ichneumonid Models (Represented on Plate XXIII). 



Hymenoptera. Coleoptrua. Hemiptbra. 



Ichiicumonidfe. Lungicomia. ReduvUdee,. 



Osprynchotus fiavipes Litopus dispar Pirates teneicollis 



(tig. 32). (tig. 30). (tig. 33). 



The Litopus is evidently one of the protected Ceram- 

 bycids, as shown by its diurnal habits, blue elytra, brightly- 

 banded less, and strong smell. The Pirates, with its dark 

 wings and black-and-yellow legs, shows a distinct approxi- 

 mation to the former insect, which is probably of a 

 MuUerian nature, as it is capable of emitting a strong 

 and unpleasant smell, can pierce very effectively with its 

 strong rostrum, and has the power of stridulation, Ospryn- 

 chotus is also a conspicuous and very common insect. In 

 South Africa it seems to be principally parasitic upon 

 Pelopeus spirifcx, and it is a curious thing that although 

 these two insects are so very different in coloration (except 

 the hind-legs), yet there is an undoubted similarity 

 between them when seen together on the wing. 



J. Black and Yellow-Barred Braconid Group and Mimics 

 (Represented on Plate XVIII). 



^ i Braconidsa Phanonieris dubius (fig. 59). 



hymenoptera I Zchneummiidm Pimpla tuberata (tigs. GO, 61). 

 Hemipteka Heduviidm Callilestes stigmatellus (fig. 62), 



