422 TIPULIDJE. 



at base of discal cell or before it ; * posterior branch of 4th 

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

 5th vein rather distinctly curved downwards at its union with 

 the posterior cross-vein, or the whole vein gently curved ; 6th vein 

 with the peculiar character of running closely alongside of the 5th 

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

 running straight to the margin of the wing ; 7th vein nearly 

 straight. 



Range. The three previously recorded living species come from 

 Porto Eico and North America. 



The affinities of this genus are with Jfltamplddia and Eleplianto- 

 myia, as demonstrated by the elongate proboscis and the absence 

 of the marginal cross-vein. Tovorhina, by its venation, which is 

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

 recognised i'rom either. 



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

 his monograph of the North American species, enters at some 

 length on the question of whether the generic name should stand 

 for the single living species known to Loe\v (fragilis, from Porto 

 ~Kico), described in 1851, or for three fossil species described by 

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

 was given. 



306. Toxorhina incerta, sp. nov. (PI. Till, fig. 9; PI. XI,. 

 fig. 12.) 



$ . Head moderately dark grey, including the underside ; 

 width of occiput one- third that of head, bare, but with 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; (he 

 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 antenna) 

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

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

 including scutellum and metanotum ; pleura? similar, barely 

 shining. Abdomen 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 Toxorhina mulicbris,Os. Sac., from North America, this cross-vein is at 

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

 coalescent. 



t This is in accordance with Osten Sacken's statement that there are 

 ten flagellar joints. 



