BY FREDERICK A. A. SKUSE. 
1365 
are, like the mosquitoes, very tormenting to mankind and the 
lower animals. In South America one or more species of 
Simulium goes by the name of “ mosquito.” In North America 
it is called the “ black fly.” Sinudmm cohimhatschense, Sch., 
seems to be the most dreaded species ; it inhabits Hungary, and 
cattle are said to sometimes succumb to its attacks. Hagen 
(E. M. Mag. Vol. XIX. No. 227, p. 254) notes a N. American 
species which feeds upon the blood of the chrysalids of a species 
of butterfly {Pieris menaina). 
I have only twice found specimens of the following described 
species, and then only in very limited mrmbers, and I know no 
other instance of its capture. It seems rare and local. The 
so-called “ sand-fly ” of this country is a species of Ceratopogon^ or 
probably more than one species, only too abundant in many places, 
and inflicting very painful “ bites.” 
The larvse of Simulidse are aquatic. 
173. Simulium furiosum, sp.n. (PI. xxxix,, fig. 1). 
— Length of antenme 0‘017 inch ... 0'42 millimetre. 
Expanse of wings 0'095 x 0-045 ... 2-39 x 1-13 
Size of body 0-080 x 0-025 ... 2*02 x 0-62 
Antenme short, black, densely covei’ed with a microscopic hoary 
pubescence; 2- -f- 8-jointed, secorrd joint of the scapirs twice the 
length of the first, fii’st flagellar joint about as large as the second 
joiirt of the scapus, three following short, next three large, terminal 
joint elongate-ovate (fig. lb.). Head, hypostoma, and jralpi black, 
with a minute yellowish pubescence, very dense on the latter- ; 
joirrts of the palpi as follows : bir-.st joiirt srrrall, secorrd twice the 
length of the first, stout, elongate-ovate, third somewhat shorter 
than the second, more .slender, claviform, a little emai-ginate oir 
the inner side near the apex, fourth joint somewhat longer than 
the second, slender, sub-cylindrical, a little dilated towards the 
apex (fig. la.). Eyes deep black. Thorax black, opaqrre, indistinctly 
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