346 Annah of the South African Mugeilm. 



Mesogomphus elpidius, n. sp. 



S. Afr. Mus. : 2 (J , M'Fongosi (Zululaud, iii, iv . 1911, Jones). Mus. 

 Tervuereu : 1 ? , Kapiri, Katanga (xi . 1912, Legros). 



Similar in colour to M. Hageni, but obscure markings deeper in 

 colour and more sharply defined. 



Fia. i9.—Mesoriomphus elpidius, g. M'Fongosi. Terminal segments, 

 ventral and left side view. 



^. Labium dull whiti.sh ochreous. Lahrum, face and Irons very 

 light yellowish green, light and very diffuse lirownish traces at anterior 

 margins of labrum, ante- and postclypeus ; brownish transverse band 

 on anterior face of vertex across the ocelli, slightly encroaching on the 

 base of frons. Vertex as in M. Hayeni ; occijDital plate without the 



Fia. .50. — Mesogomphus elpidius, $ . M'Fongosi. Genitals, second seg- 

 ment, left side view. 



longitudinal ridge. Thoracic pattern, Plate IX, fig. 3. Legs dull 

 ochreous ; narrow lines on femora and their ends darker brownish ; 

 internal side of tibiae, lateral side of third tibiae, tarsi and spines 

 blackish. 



Abdomen similar in form to M. Hageni, Imt still more slender, the 

 dilatation of terminal segments being comjjaratively greater, the lateral 

 foliaceous dilatations of segments 8-9 broader. Dull olivaceous, 

 markings dark ferruginous, very diffuse (both specimens rather dis- 



