.Inly, 1880.] .f^ ^ / X , -"> 



Llio foro femora ; hind tibiae nearlj straight, sliglitly thickeiiod in the middle, busefc 

 willi bristles of unequal lengths on their outer sides, having a few long hairs on tlio 

 lower half of their under surfaeos in $ and ? , and also a few long soft hairs on 

 their inner sides, just below the middle in $ ; hind tarsi with a cushion of short 

 stiff bristles of a brownish-yellow colour on their under surfaces : alulets with the 

 upper or smaller valyes half white and half grey, and the lower and larger ones of 

 an uniform smoky-brown colour in $ , with a yellowish marginal fringe, and dirty 

 white iu ? : halteres yellow : wings clear, with black veins ; third longitudinal vein 

 with n small tuft of bristles at its base in $ and $ , some of which extend a short 

 distance towards the small cross vein. 



This species is generally distributed throughout Europe ; it is less 

 oonunoii than the next in most parts of England and Ireland (ITaliday), 

 and also in Germany, but more general in Italy and probably iu 

 France. 



It is very difficult to decide to which species to iipply Fallen's 

 original name, as modern authors differ so much on this point. 

 Haliday, whose opinion is worthy of every respect, changed his mind 

 upon the subject. In his original paper in the Entomological Maga- 

 zine, in which he first pointed out the distinctive characters between this 

 and the following species, he named the one I have first described lior- 

 torum ; but in the second volume of the Annals he said that he was 

 mistaken, and believed that the next species which he had before named 

 importuna was the true liortorum of Fallen. I have already said that 

 I have no doubt whatever that Fallen, Meigen, Zetterstedt,* and others, 

 confused two species together, so that it matters little which of the two 

 retains the original name ; I have therefore concluded to follow Loew, 

 the greatest modern authority on Dipterology, who gives the name of 

 horforum to that species which appears to be most common in the north 

 of Europe. 



2. HOBTOEUM, Fall. ,^ ? . GJauco-cltalijhra nifidd. Thorax vt 

 ahdomen ut i»M. simplice siqiuita; ^ oculis paulo distantihus ; feinorihus 

 anticis subtus extraque harhaiis ; tibiis anticis extra sp)inosis intusque 

 villosis ; femoribus mediis apice cristatis ; tibiis posticis leviter curvatis, 

 intus hreviter villosis ; alulis sordide albidis ; alis, venis lovgitudinalihns 

 tertiis, setis parvis armatis, ordine positis, inter basem vence et venom 

 transversam parvam. ? oculis tertia parti capitis separatis ; pedihis 

 simplicibus. Long. 3 — 4| lin. 



SYS.—Musca hortorum, Fallen, Act. Holm. (1816), 252, 33, et 



* Zetterstedt, in Dipt. Scand., describes his Cijrtoneura hortorum as having the eyes in cj 

 " coherentos (non vero arctissimi)," et " tibiw omnes recta; " -both these characters apply to ^f. 

 sbiiplex : but he adds, " squauias albse," et "femora antica extus in cJ villosa"~bolh of which 

 apply to M. hortorum. 



