BY ARTHUR WHITE. 189 



spinose beneath ; tibiae with numerous long bristles ; wings 

 with four posterior cells, which are all open ; anal cell also 

 open; discal cell sharply angulated below; number of sub- 

 marofinal cells two. 



Fig. 32. Wing of Marmasoma .surn]ptiiosa. 



Head about equal in breadth to the thorax ; eyes in male 

 joined. Proboscis about one-and-a-half times the length 

 of head. Palpi very slender, nearly one-third the length 

 of the proboscis. Antennae slender, slightly longer than 

 the head, the first joint bearing short hairs above and very 

 long hairs below, fully three times the length of the second 

 joint, the third very slightly expanded, a little longer than 

 the first, and provided with a thin, two-jointed style, which 

 i? about one-third its length. Thorax very convex, bear- 

 ing numerous bristles and long bristly hairs; scutellum 

 much depressed, bearing marginal bristles. Abdomen of 

 an elongated, conical shape, with the apex upraised, near- 

 ly bare. I^egs slender, the posterior femora with numer- 

 ous stout bristles beneath, anterior and middle femora with 

 one or two bristles close to the apex ; tibiae with numerous 

 long bristles; tarsi long, about equal in length to the 

 tibiae, the joints marked by spurs. Wings with two sub- 

 marginal and four posterior cells, the latter as well as the 

 anal cell, open ; discal cell sharply angulated below, the 

 angle being frequently marked b'y a recurrent veinlet. 



This genus agrees with the North and South American 

 genus Lep'doiihora and the Palaearctic and African genua 

 Toorophora in having the vestiture consisting largely of 

 scales. From the former genus it may be distinguished by 

 the shorter and differently proportioned antennye, with a 

 two-jointed style, from the latter by the four instead of 

 three posterior cells, and by the open anal cell, and from 

 both these genera by the hind-angle of the wings being 

 undeveloped. The shape of the wings more resembles that 

 of the Mediterranean and Western Asiatic genus Amictus, 

 and the European and Asiatic genus Cyllenia; from the 

 former of these Marmasoma is distinguished by the first 

 joint of antennae being densely hairy, and the third joint 

 bare and provided with a long two-jointed style, also by 

 the sharply-angulated discal cell, and the wide open first 

 posterior cell ; from the latter by the two instead of three 



