42 Mr. H. Campion on 



and Chi ends exactly two cells beyond the quadrangle, or at 

 most barely enters the third cell. 



It is a far more difficult matter correctly to associate these 

 females with their respective males, but the one from 

 Mt. Koghi agrees better with the two existing descriptions 

 of the male of /. spinipes in its larger size, the more 

 numerous postnodals, and the greater number of cells ^~^^ 

 between the origin of Mg and the origin of Mia. 



Isosiicta 7'obustior, Ris. 



1 c^ , Mt. Koghi, 10. iv. 14 (872) ; 1 c? , Mt. Canala, 14. vi. 14. 



The species being founded upon two males lacking tiie 

 terminal segments of the abdomen, a description of the 

 entire insect is now given. 



Length of abdomen 37 (Canala) to 37'5 (Koghi) mm. ; 

 hind wing 24 mm. 



Black, with a low metallic glaze. Labium yellowish 

 white; the anterior margin of the median lobe produced into 

 a pair of long narrow processes. Labrum and clypeus 

 higldy metallic. Gente yellowish or greenish. 



Hind margin of prothorax entire, elevated, rounded. 

 Meso-metathorax marked with yellow or yellowish white as 

 follows : — A. very fine line at the humeral suture ; a short, 

 rather broad band anterior to and ending at the metastigma; 

 a rather broad band on the metepimeron, bordering the 

 second lateral suture, connected with which anteriorly is a 

 line line following the inferior margin ; a stripe along the 

 inferior margin of the raetinfiaepisternum : the pectus with 

 a longitudinal median line, dilated and bifid posteriorly. 



Wings hyaline. Venation black. Pterostigma c. 1*5 mm. 

 long, dark brown, pale round the edges ; the anterior margin 

 conspicuously longer than the posterior margin, and the 

 distal margin conspicuously longer and more oblique than 

 the proximal margin, lis arising at the subnodus, M3 well 

 in advance of it. Cu, long, extending in all eiglit wings 

 about 5^ cells beyond the quadrangle. Postnodals in fore 

 wings 14-17 (Canala) or 15 (Koghi) ; in hind wings 12 

 (13 in one wing, Koghi). 



Legs black ; the coxai and femora pale brown inferiorly. 



Abdomen very long and slender, somewhat inflattd at 

 segments 1-2 and 8-10; tlie dorsum entirely destitute of 

 any pale markings ; pale brown beneath. 



Anal appendages (fig. 2) longer than segment 10, but 

 shorter than segment 9. The superior pair, in dorsal view, 

 straight, very broad near the base, somewhat acutely pointed 



