Genus Taeniorhynchus. 483 



Genus TAENIORHYNCHUS, Arribalzaga. 



Dipt. Argent., p. 47 (1899), Arribalzaga (Mod. Theobald) ; Mono. Gulicid. II., 

 p. 190 (1901), Theobald; Gen. Ins. Fain. Dipt., p. 30 (1905); Les 

 Moust., p. 381 (1905), Blanchard. 



Arribalzaga's genus was founded on Wiedemann's Culex 

 taeniorhynchus, but he evidently describes in part Walker's 

 tit i Hans, which he gives as a synonym, and in the same genus he 

 also describes two new species, confinnis and fasciolatus, again 

 quite distinct. I am inclined therefore, until Arribalzaga's 

 specimens can be found and examined, to let matters stand as 

 they do now, taking confirm is or 

 fasciolatus as the types of the 

 genus. Fiu . 217 



A number of species placed Egg mass of Taeniorhynchus arribalzagae. 



... • • n Theobald (after Goeldi). 



m this genus provisionally — 



the yellow group — which present quite a different facies to 



fasciolatus and the other brown species I pointed out, would have 



to be placed in a new genus (Gen. Ins. Fam. Culicid., p. 31, 



1905). 



Goeldi has created a genus into which these all fit admirably 

 (Chrysoconops). 



The species now left in Taeniorhynchus are the following : — 



T. confinnis, Arri. ; T. fasciolatus, Am. ; T. tenax, Theob. ; 

 T. richardii, Ficalbi ; T. perturbans, Walk. ; T. ager, Giles ; 

 T. arribalzagae, Theobald ; T. walsinghamii, n. sp. ; T. argenteus, 

 Ludlow. 



The life-history and structure of larvae, etc. of Taeniorhynchus 

 has been worked out by Professor Goeldi. The two species 



Fig. 218. 



Ova of Taeniorhynchus fasciolatus (after Goeldi). 

 (Right-hand figure enlarged, left still more so.) 



detailed by him are fasciolatus and arribalzagae. The eggs are 

 laid in a double-rowed chain, united together as in Culex pipiens. 

 The egg chain is strongly convex on the lower side. The number 

 of eggs in each chain was found to be from 60 to 63. Thev 



2 I t 



