172 [July, 1899. 



palpi black ; thorax with a short white stripe in front ; wings tinged with brown ; 

 legs with fore tibiae and tarsi red, and all other parts black. Length, 6 mm. I 

 found this fly among some specimens which had been collected by the late Mr. F. 

 Walker. 



Sp. G — C. ciLiATA, Mgn. 

 Very similar to C. pttbera, but has the legs quite black. Thorax shining black, 

 with short white median stripe in front ; scutellum black, with four setse ; palpi and 

 antennae black ; arista long haired ; wings yellowish ; legs ciliated in the male with 

 long pale hairs upon the fore femora and tibiae, and also upon the middle tibiae. 



Length, 6 — 8 mm. Kare. 



Sp. 7.— C. BISETA, Lw. 



This small, well marked species is quite black, with the exception of the fore 

 knees, which are rufous, and the fore tarsi, which are reddish-yellow on their under- 

 surfaces, but black above ; the head has the frontal stripe quite black, bordered with 

 white ; face white ; antennae black, with short but plumose arista; palpi and proboscis 

 black ; oral setae two only ; thorax dull black, with three small white, sub-distinct, 

 spots in front ; scutellum black, with two very long setae near the apex ; halteres 

 red ; abdomen in male narrow and flattened, with projecting, but not incurved, 

 shining black apex, and very large prominent hypopygium beneath ; abdomen in 

 female lanceolate and pointed ; wings yellowish-brown ; legs armed with long 

 scattered bristles. Length, 5 — 6 mm. 



This species, previously unrecorded as British, was taken by Col. Yerbury in 

 Herefordshire, where it is not uncommon ; and both sexes were kindly sent to me 

 by Dr. John H. Wood, of Tarrington, near Ledbury. 



Sp. 8. — C. ALBIPES, Fin. 



hilineata (var.), Mgu. 



Head subglobose ; frontalia and face pale yellow, the former with a black ocellar 

 triangle on the vertex ; antennae short (with long haired arista), light yellow in 

 colour, together with the palpi and proboscis ; oral setae with one long bristle on 

 each side ; thorax with upper surface black and shining, and the sides and under- 

 surface yellowish-white ; scutellum black, with four setae, and sometimes marked 

 with a median white line ; halteres white ; abdomen glistening black and hairy ; 

 hypopygium partly white ; wings flavescent ; legs (including the coxae) quite pale. 

 This species varies considerably in colour, being sometimes almost entirely pale ; 

 and at others having the thorax yellow, marked by two black stripes, when it be- 

 comes the C. bilineata, Mgn. Length, 4 — 6 mm. Not uncommon. 



Gen. III.-NORELLIA, Dsv. 



Gen. ch. — These closely resemble those in Cordylura ; the only 

 important distinction being the armature of the fore femora with a 

 number of long and strong spines in the former genus. The arista is 

 also generally more shortly haired, and sometimes bare, and the pali)i 

 are without apical setaj. 



