THE CANADIAN ENTOMOLOGIST. 



87 



brown, third I'ght brown, remainder lacking. Front, vertex, genœ and 

 occiput dark brown. • 



Thorax : Mesothoracic pr?escutum strongly produced cephalad, 

 entirely covering the pronotum : cervical sclerite elongated, prominent ; 

 transverse suture scarcely V-shaped ; mesothoracic pi?e5cutum, dark 

 brown anteriorly, posteriorly with a pale brown median line, which extends 

 back across the scutum, remainder of thoracic dorsum dark brown. 

 Sterna, episterni aniepimeri brownish yellow ; haltères pale; legs long, 

 dull brown, at the joints somewhat darker; no processes on the fore 

 femora, as described for M. fragiilima and M. curtipemiis. 



Abdomen uniform brown. 



Wings hyaline, costal margin yellow, stigma rather indistinct. Vena- 

 tion (see fig. 3), Sc very long, as in all members of the genus ; R long, 

 cross-vein r near its tip. Rg gently arcuated, forking far before the tip 



Fig Z.—Mangonia zambezia-, holot} pe. 



of Sci and in a line with R^+g ; the cross-vein r far before the fork of R2+3 ; 

 R2 short, oblique ; Rg long, in a line with R.^+g. R^+g fusing with M1+.3 to 

 form the proximo-anterior border of cell Mg, thus obliterating the r-m 

 cross-vein. M forks at the lower corner of cell Mo, Mj^.^ departing 

 cephalad, fusing with R^^g for a distance and finally separating, free at the 

 margin ; M3 in a line with M. Cu short, its fork far back, the free position 

 of Cu^ very long, fusing with M3 at the fork of M, and continuing to the 

 margin so fused. Cu., fuses with ist A far back from the wing-margin, so 

 that 1st A + Cuo is over twice the length of the free portion of Cu.^ alone. 

 2nd A is very short, suggesting the condition found in Petaurista. 



Hclotype. — $ , Queliniani, Zambesi R., Dec. 20, '08 ; Mr. C. W. 

 Howard. 



The genus Mongoma, of which ten species have been described, has 

 a world-wide distribution in the tropics ; two species have been described 

 from the West Indies, five species from the East Indies and Australia, and 

 three species from Africa. The genus is distinguished by the excessive 

 length of Sc, the obliteration of the radio-medial cross-vein by the long 



