1878.] 321 [Burgess. 



est consideration, writes me that he is inclined to subordinate the 

 structure of the antennae in Arthropeas to its general habitus, which 

 is undoubtedly that of a Leptid; for he argues that there is no more 

 reason for regarding this organ as so constant in the Leptidae, than 

 in the Xylophagidae, Stratiomydae, etc. 



If we admit this genus to a place among the Leptidae, perhaps the 

 doubtful form I am about to describe as Glutops singular is, would 

 most naturally follow, although it is certainly by no means so closely 

 related to this family as is the former genus. 



Besides the difference in antennal structure, Glutops diverges from 

 the Leptidae in the stoutness of the body, the great breadth of the 

 head, and the retraction within the abdomen of the last segment, so 

 that the abdomen is apparently only six-ringed, and shorter and 

 wider than in the Leptidae. The wings are also narrower. In all 

 the above particulars, except the narrowness of the wing, it differs 

 from the Xylophagidae, and also in its hairiness, the contact of the 

 eyes 1 in the male, and the spurless fore tibiae. From the Tabanidae, 

 which it somewhat approaches in habitus, 2 and in the shape of the 

 eyes, the small tegmina distinguish it readily, and probably the oral 

 structure, which I cannot determine. 



The nearest allies of Glutops among the Leptidae, are the species 

 of Symphoromyia Frauenf., where the head is broad and the face 

 short, and the body is sparsely clothed with long fine hair. Among 

 these species, too, the antennae diverge in structure from the typical 

 Leptidae. 

 Glutops 3 gen. nov. 



Body stout, musciform, clothed with long fine hair. Head broader 

 than the thorax; eyes naked, broader than high and contiguous over 

 the whole front (<?). Antennae approximate at the base, longer than 

 head, first and second joints long, with long bristles above. Third 

 joint 8-annulate, first annulus long. Face projecting into two rounded 

 conical protuberances, thickly covered with long hair. Palpi long, 

 decurved, filiform; proboscis with thick labia and four? bristles 

 Wings narrow, marginal vein encompassing the whole border. Third 

 vein furcate, two intercalary veins present, fourth posterior and the 



1 If we regard the Ccenomyidse as a distinct family. 



2 Compare especially the genus Pronopes Loew (Dipt. Sud-Afrika); it is widely 

 separated, however, from this form, even disregarding the structure of the mouth. 



3 From ykovros, rump, and <i^, face. Name suggested by Baron Osten Sacken 

 in allusion to the shape of the face. 



