July, 1830.] 
25 
the fore femora ; hind tibiae nearly straight, slightly thickened in the middle, beset 
ti bustles of unequal lengths on their outer sides, having a few long hairs on the 
ower half ° f tlleir under 8Urfaces in <? and ? , and also a few long soft hairs on 
t ieir 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 valves 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 
^hite m ? : halteres yellow : wings clear, with black veins; third longitudinal vein 
with a 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 
common than the next in most parts of England and Ireland (Haliday), 
and also in Germany, but more general in Italy and probably in 
France. 
It is very difficult to decide to which species to apply 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 hor- 
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 
hortorum to that species which appears to be most common in the north 
of Europe. 
2. hortorum:, Fall. J* . Glauco-chalybea nitida. Thorax et 
abdomen ut in M. simplice signata ; £ oculis paulo distantibus ; femoribus 
anticis subtus extraque barbatis ; tibiis anticis extra spinosis intusque 
villosis ; femoribus mediis apice cristatis ; tibiis posticis leviter curvatis 
intus breviter villosis ; alulis sordide albidis ; alis, venis longitudinalibus 
tertiis, setis parvis armatis, ordine posiiis, inter basem vena; et venarn 
transversam parvam. ? oculis tertia parti capitis scparatis ; pedibus 
simplicibus. Long 3 Un 
Sy s.—Musca hortorum , Fallen, Act. Holm. (1816). 252. 33 , et 
