438 



tipulid.t:. 



In that year Osten Sackeu mentions an undescribed recent 

 species in the Stockholm Museum from Caffraria. 



These two genera, though distinctly abnormal, are eminently 

 related to Gonomyia and its allies by the position of the anterior 

 branch of the 2nd longitudinal vein and also by irregularities 

 concerning the 3rd longitudinal vein and the anterior cross-vein.* 

 Gonomyia, in certain species, foreshadows these irregularities, 

 including that of the absence of the anterior cross-vein, for it 

 comprises species possessing either one or two submarginal cells, 

 and exhibits a variation of venation which makes it suitable as a 

 central genus around which to arrange the others. This variability 

 also is sufficient to prevent its dismemberment, since all the 

 species sliow sufficient resemblances to retain them under one 

 genus. 



I retain Gnoj^homyia, Os. Sac, and Si/mpleeta, Mg., together, 

 in accordance with recent Catalogues, but it has often occurred 

 to me that Gnopliomyia, with its greater degree of " parallelism " 

 in the veins, and its posterior cross-vein near the middle of the 

 discal cell, was in some way a connecting link between Gonomyia 

 and the Limxophilini, whilst Symplecta, by its general appearance 

 and its posterior cross-vein before the discal cell, reminds one 

 rather strongly of the Limnobiini, although its place in this 

 section cannot, of course, be questioned. 



Table of Genera of Eriopterin i. 



1. Four posterior cells (three only iu 



Pai'amongoma) 2. 



Five posterior cells 15. 



2. Wings distinctly hairy, even if only 



along the veins ; often very con- 

 spicuously so 8. 



Wings practically bare (J. 



3. Wings closely pubescent over the [p. 440. 



whole surface as well as on the veins . Rhypholophus, Kol., 

 Wings pubescent along the veins only . 4. 



4. Tlie 3rd longitudinal vein emerging 



from the lower bi-anch of the 2nd, 

 thus making the 1st submarginal 



cell longer than the 2nd Molophiltjs, Curt., p. 443. 



The 3rd longitudinal vein emerging as 

 usual from the prsefurca, thus making 

 the 1st submarginal cell shorter than 

 the 2nd 5. 



5. Posterior branch of 4th longitudinal 



vein forked Erioptera, Mg., p. 445. 



Anterior branch of 4th longitudinal [p. 458. 



vein forked Mesocyphona, Os. Sac, 



6. The 1st submarginal cell short, not 



more than half as long as the 2nd .. 7. 

 The 1st submarginal cell long, much 

 more than half the length of the 2nd. 13. 



* This question is fully dealt with iu the notes uuder Gonomtjia (p. 468). 



