422 TipuLiDii:. 



at base of discal cell or before it ; * posterior braucb of 4tb 

 vein widely forked a little beyond tbe anterior cross-vein ; the 

 5tli vein i-atlier distinctly curved downwards at its union with 

 the posterior cross-vein, or tbe whole vein gently curved ; Gtb vein 

 witb tbe peculiar cbaracter of running closely alongside of the 5th 

 for nearly half its lengtb, and then breaking away suddenly and 

 running straight to tbe margin of tbe wing ; 7tb vein nearly 

 straight. 



Range. The three previously recorded living species come from 

 Porto Rico and North America. 



The aifinities of this genus are with Wunnphidia and Elephanto- 

 myia, as demonstrated by the elongate proboscis and the absence 

 of the marginal cross-veiu. Toivorliina, by its venation, which is 

 different from that of any other genus in the family, is easily 

 recognised from either. 



Osten Sacken, after his very ample description of this genus in 

 bis monograph of the JN'ortb American species, enters ar some 

 length on the question of whether tbe generic name should stand 

 for the single living species known to Loew (fragilis, from Porto 

 Rico), described in 1S51, or for three fossil species described by 

 liim (Loew) from amber in 1850, for which no generic description 

 was given. 



30G. Toxorhina incerta, sp. nov. (PI. YIII, fig. 9; PL XI, 

 hg. 12.) 



2 • Head moderately dark grey, including the underside ; 

 width of occiput one- third that of head, bare, but witb some 

 black hairs on back of head near neck. Scapal 1st joint sub- 

 cylindrical, 2nd joint robust, larger, obconical; 1st flagellar joint 

 much enlarged, narrower at tip, nearly as broad at base as 2nd 

 scapal joint, remainder of flagellum narrow, cylindrical; the 

 number of joints is not quite obvious : f apparently there are 

 nine in addition to the enlarged basal joint ; the last four joints 

 have one or two long isolated hairs on each ; the whole antennoe 

 brownish yellow. Proboscis over 2 mm. in length, black, shining, 

 bare ; no palpi obvious. Thorax wholly dark blackish brown, 

 including scutellum and metanotum ; pleurae similar, barely 

 shining. Ahilomen black, dull, belly concolorous. Genitalia very 

 large and conspicuous, basal joints of ovipositor very robust, 

 the terminal blades long; reddish brown. Wings pale grey. 

 Auxiliary vein ending in costa just beyond origin of 2nd longi- 



* In Toscorhina mtih'ebris, Os. Sac, from North America, this cross-yein is at 

 tlie pointed base of the 2nd posterior cell, with which cell the discal is 

 eoalescent. 



+ This is in accordnnce with Osten Sacken's statement tliat tliere are 

 ten flagellar joints. 



