( 501 ) 



XIII. Notce DipterologiccB. No. 2. — Descriptions of 

 some new exotic species 0/ Tipiilidaj. By J. O. 

 Westwood, M.A., &c., Pres. Ent. Soc. 



[Read 1st March, 187G.] 



The family TipuUdce in its widest extent comprises species 

 -which exhibit a wouderfid series of modifications in the 

 structure of the antennas, and especially in the arrange- 

 ment of the wing-veins. Many years ago I described 

 some interesting forms, allied to the more typical Tipulce, 

 in the Philosophical Magazine* and in the Zoological 

 Journal ;t and on the present occasion I have described 

 and figured some curious species of the same division with 

 which our collections have more recently been enriched, 

 including some of the most gigantic Dipterous insects 

 hitherto recorded, the wings of one of the species measuring 

 not less than four inches in expanse, and others more than 

 three inches, whilst the legs of some of the species are dis- 

 proportionately elongated. 



Genus nov. Semnotes. 



Corpus crassum, pro familia valde abbreviatum, thorace 

 antice valde convexo, capite minuto, declivi, supra fere 

 incouspicuo. Oculi prominentes latcrales, naso declivi, 

 supra arcuato, apice acuto. Trophi abbreviati, palpis 

 brevibus setosis, articulo basali ? minuto, 2ndo mediocri, 

 apice crassiori, 3tio paullo longiori ante medium parum 

 constricto, 4to longitudine 2di, ultimo fere duplo longiori, 

 apice incrassato. Antennas minutfe, capite multo breviores, 

 articulo Imo brevissimo crasso, 2ndo omnium maximo, 3tio 

 brevi subcyathiformi, 4to subovali, 5to (ex articulis duobus 

 arete coalitis composito?) minuto conico, tribus reliquis 

 gracillimis, setis longis parum sparsis, ultimo in medio 

 crassiori. 



Alas cellula antica discoidali elongata, venas 4 ad apicem 

 emittenti ; cellula postica elongata duas emittenti, cellula 

 svibapicali venas tres emittenti, quarum antica bifarcata. 



* Lond. and Edinb. Phil. Mag., April, 1835, p. 501. 

 t Zool. Journal, vol. 5, p. 447. 1835. 



TRANS. ENT. SOC. 1876.— PART IV. (dEC.) 



