ERIC MJÖBERG, ISOPTERA. 13 



fine veinlets, forewings four times as long as broad, hind 

 wings a little shorter; scapular sbield on the forewing much 

 larger, showing the base of six strongly marked nervures, 

 rounded, the anal field well set off, the nervature very vari- 

 able (see Text Fig. 4), the first nervure (costa) hardly visible 

 from above, not very far from the wing-root meeting and 

 joining with the second one (subcosta), which runs along the 

 börder of the wing to near the middle, where it joints with 

 the strong 3nd one (radius) and continues along the margin; 

 the 4th (radius sector) freely emerging from the scapular 

 shield and running parallel with the margin almost right out 

 to the tip, sending out 9 parrallel transverse nervures for- 

 wards; the 5th nervure (mediana) runs close to the 4th, 

 connected with it at irregular intervals by about 14 trans- 

 verse nervures and sending out backwards a varying number 



Text Fig. 4. Imago of Calotermes malandensis Mjöb. n. sp. 



of darkly coloured nervlets in to the membrane, which further 

 on becomes more transparent and forms a faint irregular 

 network in the interstice between the 5th and the 6th (cubi- 

 tus) nervures; cubitus very well developed, running through 

 the middle of the wing and sending out about 6 short, 

 thick, darkly coloured transverse nervures a t base of which 

 the 2nd, the 4th and the 6th often^ are forked near the base, 

 and further out on the membrane 5 — 6 more faint, irregular 

 nervures, which sometimes are connected by smaller cross 

 nervures; the hind wing has a very small scapular shield, 

 wherein hardly any nervures can be traced; only four strong 

 nervures commence at the base; the costa is quite rudiment- 

 ary, the subcosta foUows the anterior board of the wing, 

 the radius at first runs nearly parallel to it, but further 

 out slopes up into the subcosta, and near the middle is 

 connected with it by a small cross-veinlet; radius sector (3rd) 



