Neuro2)tera Odonata from Mashonaland. 193 



above, in Nov. 1903) and immature male (Oct. 1903). — Head 

 yellow, antennal tubercles surrounded with purple (vertex 

 wholly purple in male) ; thorax yellow, a black isosceles 

 tiiang-le above, pointing backwards, and with 5 or 6 more or 

 less confluent oblique stripes on the j)leura ; interalary space 

 varied with black and yellow ; abdomen yellow, with 3 black 

 bands, widening behind, one median, the others lateral ; the 

 lateral ones more or less interrupted towards the base ; fourth 

 segment with a black transverse line near the base, simulating 

 an imperfect carina (in the pruinose males first described this 

 is hidden). All else as in the adult males previously 

 described. 



In a still more immature male, taken in October, which 

 seems to belong to the same species, the neuration is reddish, 

 with the yellow at the base of the wings more extended ; the 

 dark median triangle of the thorax and the median abdominal 

 stripe are barely indicated, and the pleura and sides of abdo- 

 men at the base are almost white, with oblique black lines. 



Mi'sthoius amhigaus, sp. n. 



Exp. al. 70 mm.; long. pter. 3 mm. ; long. corp. 38 mm. 



Male. — Vertex purple, with greenisii shades in certain 

 lights ; face mostly greenish ; rhinarium black, with an orange 

 spot on each side ; mentum black, with a broad orange band 

 on each side ; outer orbits yellow, spotted with black. Body 

 and wings nearly as in the last species ; fore wings with 11 

 continuous cross-nervures, and sometimes an accessory one on 

 one side, not continued beneath, 10 in the upper postnodal 

 space, and 7 ia the lower : hind wings with 7 or 8 continuous 

 antenodal cross-nervures, 10 or II in the upper postnodal 

 space, and 7 or 8 in the lower. 



Otherwise as in the last species. 



Hah. Transvaal (//. Ross) ; Cape Colony. 



A larger and stouter insect than M. Marshalli. Perhaps 

 allied to OrtJielrum farinosum, Forster, also from the 

 Transvaal. 



This is not one of ^Ir. Guy Marshall^s captures, but I 

 describe it here as an additional species of the new genus 

 Misthotus. 



