418 Mr. G. H. Verrall’s Notes on Syrphidze 
femora ranging from dull brownish-black with a paler tip to being 
all dull ochreous except a blackish streak above the anterior pairs 
on the apical half, or sometimes the basal half of the hind femora 
blackish ; the hind tibize have only obscure blackish patches before 
and after the middle ; pubescence mostly short and inconspicuous, 
but there are some scattered thin hairs beneath the hind femora, and 
there is a neat fringe beneath the hind tibiz, besides which the short 
black bristles beneath the hind femora form a large irregularly crowded 
clump between the middle and the tip; the knob-headed hairs 
beneath the basal joint of the kind tarsi are almost as distinct as in 
the male. 
“ Helophilus sp. nov? near HH, senegalensis, Macq., Dipt. 
exot., 11, p. 61. 
Not uncommon in the bed of the stream at Haithalhim.” 
Three males and five females. 
I am prepared to go further than Col. Yerbury, and to 
say that I think that the species is H. senegalensis, but as 
the insect described by Macquart could be identified only 
by a reference to the type, which is not in Bigot’s 
collection, I prefer to give a name and description which I 
hope may serve for identification. 
This species is very near H. caffer, Loew, but it has the 
middle yellow line on the thorax far more distinct, and 
also has different abdominal markings. In all probability 
it is one of a group of closely allied African species which 
would come under Rondani’s genus Mesembrius, in which 
the eyes of the male touch and of which one species only, 
H. peregrinus, Loew, is known to occur in Europe. There 
are many species closely allied to H. trivittatus in Europe 
and North America, and in Arctic regions there is a 
group circling round H., borealis. 
12. Syritta latitarsata. 
Syritta latitarsata, Macq., Dipt. exot., ii, p. 75. 
Colonel Yerbury’s notes (“ Syritta abyssinica ? Rondani, 
Ann. Mus. Genov., iv, p. 282; fairly common at Lahej and 
Haithalhim”) merely suggest that this and the next 
species, which he also refers to, may be S. abyssinica of 
Rondani. I cannot agree with this, but I believe that the 
little-known S. datitarsata of Macquart is clearly repre- 
sented by three males and four females among Col. 
Yerbury’s captures. 
