l^Q ' [February, 



a very similar manner to that of T. hrevipennis, only the white bands are much 

 wider ; there are set£e both on the disc and edges of the segments ; wings greyish, 

 with both the apical and outer cross veins curved. The females of this species are 

 not uncommon, but I have only seen one male, which is in Miss Decie's collection, 

 this sex was not known to Meigen. 



T. AGiLis, Mgn. 



Head with the eyes rather near together in the male ; facialia ciliated for about 

 one-third of their length ; antennae with third joint from one and a half to twice the 

 length of the second ; arista thickened for only one-third of its length ; palpi 

 black ; thorax brownish-black, with front and sides white, marked with four rather 

 indistinct black stripes, and armed with three external centro-dorsal bristles behind 

 the groove ; abdomen setose, tessellated with brown and grey patches, which form 

 rather indistinct transverse bands on the segments, which are armed with setae on 

 both the disc and edges ; scutellum black ; wings greyish, having the apical cross 

 veins long, oblique, and straight, and the other cross veins sinuous. 



Rare ; I have not seen the female. Miss Decie has a specimen in her collection 

 which I named T. bibens, Mgn. ; I now think that T. bibens and T. agilis are the 

 same species. 



T. HORTENSIS, MgU. 



Head with face white ; antennae with third joint twice as long as second ; 

 fronto-orbital bristles only extending down one-third of length of face ; facial 

 bristles reaching half way up facialia ; palpi black ; thorax covered with pale grey 

 pubescence, and marked on front margin with four black stripes ; outer dorso-central 

 bristles three behind the groove ; scutellum black ; abdomen blackish-grey, first 

 segment unmarked, others with an even whitish band round the front margin of 

 each, and with setae both on the disc and edges ; wings with apical cross vein 

 straight, with a blunt angle at the base, and ending near the apex of the wing, first 

 posterior cell nearly, or quite, closed. Eare ; one female is in Miss Decie's col- 

 lection : the male has not been described. 



T. TIBIALIS, Fin. 



Head with forehead rather prominent, frontal stripe wide and rufous, or 

 piceous ; fronto-orbital bristles only extending as far as the root of the second an- 

 tennal joint ; antennae with the second joint two-thirds the length of the third ; 

 facial bristles few ; vibrisssD numerous ; palpi black ; thorax ash-grey, with three 

 stripes, central one wide, and sometimes divided by a fine line ; outer dorso-central 

 setffi three in number behind the groove ; scutellum black ; abdomen grey, with 

 black reflections and tessellations, and a narrow black band on the hinder edge of 

 each segment (except on the first, which is quite black) ; setai on the disc and mar- 

 gins of the rings ; sides of second and third segments slightly rufous in the male ; 

 wings yellowish, with apical cross vein nearly straight, and ending near the tip of 

 the wing, outer cross vein sinuous ; legs black, with the tibia? red or yellow, fore 

 tarsi of the males with long claws and hairs. Not uncommon ; it has been bred by 

 Mr. Billups from Vanessa urticce. 



