* 



Clare Island Survey — Diptera. 25 o 



*T. prasinatus Staeg. — M.: A chill, two $ (H.) ; Lough near Westport, 



one 2 (G.). 

 *T. psittacinus Mg. — M. : Glendarary, one $ , and Achill N.E., two 2 (H.) 

 Clogher, one $ and two 2 (G.). This species has hitherto been regarded 

 as doubtfully British. 

 *T. pusillus L. — M. : Knappagh, four $ (G). The name of this tiny species 

 is given in italics in Verrall's " List " as being only " reputed " British. 

 I have specimens taken in Edinburgh. No doubt it is constantly over- 

 looked on account of its small size (2 mm.). It is bright green, with 

 three shining black stripes on the thorax, the middle one of which is 

 distinctly double behind. The front tibia is shorter than both the 

 femur and the metatarsus. 



T. riparius Mg. — M. : Glendarary, one 2 (H.) ; Westport, one $ and 

 four 2 in the Demesne and one 2 in garden (G). 



T. rufipes L. — M. : Glendarary, one c? and one 2 (H). 



T. tentans Fab. — CI. : two $ and two 2 (H.). M. : Lough near Westport, 

 one $ and four 2 (G.). 



T. viridis Mcq. — M. : Clogher, two $ (G.). A species belonging to the 

 group characterized by having a green thorax, with reddish-yellow 

 longitudinal stripes. It is distinguished from many of its allies by 

 having the front femora and tibiae of approximately equal length. 



Cricotopus bicinctus Mg. — M. : Westport, one $ in garden and one $ in 

 Demesne (G.) ; Lough near Westport, one 2 (G). 



C. motitator L. — M. : Louisburgh, one 2 (H.). 



C. silvestris Fab. — M. : Westport, four $ and one 2 in Demesne (G.) 

 Lough near Westport, one 2 (G.) ; Belclare, one $ (G.). This species has 

 the femora, with the exception of the tip, whitish, the thorax yellow, 

 with three shining black longitudinal stripes, and the abdomen velvety 

 black, with whitish edges to the segments, and usually broad, yellowish 

 transverse bands on the first, fourth, and fifth segments. 

 *C. tibialis Mg. — CI. : two $ (H.); one $ (G.). M. : Lough near Westport, two $ 

 and two 2 ; Clogher, two $ and one 2 ; Knappagh, one 2 (G.). One 

 of the plainest-looking species of this interesting genus. Distinguished by 

 its wholly dark tarsi and broad, obscurely whitish band on the tibiae. 

 The female is similar to the male; but the shining black on the dorsum 

 of the thorax is broken up by the yellow ground-colour into three more 

 or less distinct longitudinal stripes. 

 *C. trifasciatus Panz. — M. : Mulranny, one 2 (G.). Var. tricinctus Mg. — M. : 

 Clogher, five $ and one 2 (G.) ; Lough near Westport, one 2 (G.). 

 A well-marked species, with the first, fourth, and seventh segments 



*. 



