326 [Documber, 



38 (41) Apical cross vein of wings curved. 



39 (40) Wings with cubital appendix 19. ffrandis, Ztt. 



40 (39) Wings without appendix 20. affliiis, Fin. 



41 (38) Apical cross vein straight 21. noctHicida,'Rud. 



42 (27) Scutellum quite black 22. jucunda, Mgn. 



E. VULGARIS, Fin. 



This, which may be considered as the typical species in the genus, witli which 

 many of the others may be compared, may be known from all the other British 

 ones with which I am acquainted by having the palpi, antennae and legs black, and 

 the scutellum with a red apex.* The eyes are widely and almost equally separated 

 in both sexes; the fronto-orbital bristles have four or five seta?, which extend on to 

 the cheeks in an even row below the roots of the antennae ; the latter have the third 

 joint usually four times as long as the second, with the front margin nearly or quite 

 straight ; the arista has the second joint somewhat elongated, and the third thickened 

 for fully half its length ; the facialia are mostly ciliated along tlieir lower halves 

 with small bristles ; the thorax is dull black, covered with hoary pubescence and 

 marked with four longitudinal lines, the central pair being narrow and the outer 

 ones irregular and maculiform ; the abdomen is hoary on the sides and front margins 

 of the rings, and has their posterior edges and a central dorsal line black ; the seg- 

 ments are armed with setae both on the edges and disc ; the wings have the apical 

 cross vein a little curved, and the outer one slightly sinuous ; the legs have the hind 

 tibiae ciliated with a nearly even row of bristles, which have one or two longer ones 

 among them. 



This species, which is one of the most common of all the TachiniidcB, is ex- 

 ceedingly variable both in size and other characters ; thus the third joint of the 

 antennae is sometimes not more than three times as long as the second, much 

 thickened, and rounded at the end, when it probably becomes the T. magnicornis or 

 T. rotundicornis, Ztt. Again, the palpi are often testaceous at their ends ; the 

 facialia also are sometimes nearly or quite bare, and the scutellum is occasionally 

 black instead of having the end pale. 



E. AMPLICOBNIS, Ztt. 

 This is rather an aberrant but well marked species. It is narrow and oblong in 

 shape ; the forehead is rather prominent ; the eyes in the male approximated ; the 

 antennae have the third joint about three times the length of the second, very thick, 

 with the extremity rounded, and the front surface rather concave ; the arista is 

 rather short and thickened to beyond the middle ; the fronto-orbital bristles extend 

 down the cheeks almost to the bottom of the face, there being about eight below the 

 roots of the antennae ; the facialia are almost bare ; the palpi are black ; the thoi-ax 

 is black, marked with four rather indistinct stripes ; the abdomen is grey, tessellated 

 with black ; the first segment is nearly as long as the others, and they are all armed 

 with setae on the disc and edges ; the scutellum is black or grey ; the wings have the 

 third longitudinal vein armed at its base with a row of six or seven setae ; the outer 

 cross vein is seated neai'ly one-third nearer to the angle of the fourth longitudinal 

 than to the little cross vein, the apical cross vein is a little curved, and terminates 



* Sec remarks upon Ex. parens, Hud., at the end of this genus. 



