48 Records of the Indian Museum. [Vol. X, 



Section IV. SABETHINL 



The genera comprised herein under this section are distributed 

 finally by Theobald (Monog., v, 554 et seq.) in three sub-families : 

 (i) Trichoprosoponinae, with Runchomyia, Trichoprosopon, Joh- 

 lotia (wrongly admitted as a good genus), Hyloconops, Goeldia and 

 Eretmapodites; (2) Deiidromyinae, with Sabethes, Phoniomyia, 

 Wyeomyia, Menolepis, Bolhodeomyia, Sahethoides, Dendromyia and 

 Prosopolepis ; Limatus forming his other sub-family. Two other 

 genera Philodendyomyia and Polylepidomyia, though included in 

 hi?, table are rightful!}^ excluded in a footnote and referred to the 

 Uranotaenia group, the metanotum being nude. 



He places Dinomimetes, Knab., m. the Deinoceratinae, a sub- 

 family he characterizes by the very long 2nd antennal joint, and 

 short palpi in both sexes, but the metanotum bearing setae is a 

 stronger character than the abnormal length of the 2nd antennal 

 joint, and the genus must come in the present section. 



In separating the genera Theobald uses scale distribution, 

 some points of venation and the length and shape of the proboscis 

 as distinguishing characters. 



On examining the genera syst^maticall}', two are seen to be 

 individually specialized, Dinomimetes and Runchomyia , whilst in 

 possessing the palpi always more than half as long as the proboscis, 

 Tnchoposopon & 9 , Eretmapodites cf and Hyloconops & are separa- 

 ted from the remainder, in which they are at most one-third as 

 long as the proboscis. 



Sabethes is easily recognized by the paddle-like scales on some 

 of the legs, a feature absent in the other genera except in some 

 species of Eretmapodites {v. tab. genera, post). This feature is by 

 no means generic in itself, it is not dependent on sex and occurs 

 in various genera in dipt era, Empis, Rhamphomyia, etc. 



The proboscis varies considerably in length, from half as long 

 as to longer than the whole body, and ma}^ be dilated or swollen 

 apically or not. No generic characters can be safely drawn from 

 it in this section except to identify Limatus. The antennae are 

 normally pilose in both sexes, a little denser in the cf , and this 

 character appears fairly constant, but it is subplumose or plumose 

 in Sabethes and certainly plumose in Hyloconops. 



Even of Wyeomyia I have seen no definite statement of 

 the number of palpal joints in the cf , whilst there seems an uncer- 

 tainty of them being 3-jointed in the $ . 



The presence of chaetae only scales only or both together may 

 all be regarded as of equal taxonomic value. 



Table of genera in Sabethini. 



A 2ndantennaljoint very long. (Meta- 

 notum with chaetae) .. Dinomimetes, Kr\ah. 

 A A 2nd antennal joint normal. 

 R Palpi comparatively long, always 

 more than half as long as proboscis. 



