300 ENTOMOLOGICAL NEWS [July, '13 



sion is slighter tlian in the female; a yellowish fuscous line runs along 

 the impression and unites with the similarly colored spot on the hind 

 margin. 



Prothorax dark ochraceous and short, little broader than long, little 

 enlarged behind, and somewhat rounded before; two slight transverse 

 impressions, one near the hind margin and another in the middle; on 

 each side with some long and strong hairs. Meso- and metathorax dark 

 ochraceous above, ventral side yellowish. 



Abdomen slender, and shorter than wings, underside somewhat yel- 

 lowish. 



Legs slender, with black hairs ; coxae and femora yellow, the latter 

 thicker in the middle, slender portion more or less suffused with 

 brown; tibiae and all tarsal joints black, shining; spurs as long as the 

 basal tarsal joint, nearly straight and testaceous; claws testaceous. 



Wings hyaline, suffused with light yellowish brown, inner margin 

 strongly suffused with dark brown ; a darkish narrow cloud exists be- 

 tween the radial and the ist cubital veins; more deeply clouded below 

 this ; upper one is rather wide in the hind wing and much inclined to 

 unite itself with the lower one; veins mostly pale, but the sub-costal, 

 radial and cubital veins yellowish orange ; pterostigma small, especially 

 in the hind-wing, rounded and milk-white. 



Length of body, $ 40 mm., 9 50 mm. ; fore-wing, $ 50 mm., $ 

 57 mm. ; hind-wing, $ 50 mm., $ 58 mm. ; antennae, $ 12 mm., 5 

 10 mm. 



A male and a female specimen captured by Mr. K. Asakura 

 at Horisha, Formosa. 



This splendid species is undoubtedly the largest of the genus 

 Mynmeleon in Japan and also, of course, one of the largest 

 of known species. 



If the formation of new genera, Baliga, Balaga and Ensa, 

 which Navas proposes on the basis of the difference of neura- 

 tion, be justified, this species may also perhaps represent a 

 new genus, because such a difference between Baliga asa- 

 kiirae (Matsutnura) and Balaga niicaiis (McLachlan) is 

 readily found among this and other species. But I am much 

 inclined to think that the Navas classification may not be 

 justified. 



The species described from Japan by Okamoto in Wien. 

 Entom. Zeit., xxix, 1910, and by the author in the present 

 paper, taken together, number eighteen. In addition to these 

 a species, Ensa otiosns. which I ventured to transfer to the 



