194 [January, 
cimen to be nitens, but it is scarcely smaller and has the femora 
quite as yellow as in nitidicolUs ; I have very little doubt, however, 
but that it is a female nitens. The species seems only to have been 
observed by Zetterstedt and Bonsdorfi" in the extreme north of 
Europe. This is most similar in appearance to latifasciatus, but 
may be known from that immediately by its black-haired scutellum. 
12. Niffrifarsis, Zetterstedt, Dipt., Skan., ii, 710, 11 (1813). This spe- 
cies diflers from nitidicolUs in the tarsi being wholly, and the 
femora for the basal third, black ; the wings are more pellucid, the 
thorax not quite so bright, and the hinder tibise have a faint ob- 
scure ring. It differs from nitens in the broader abdominal bauds, 
rather larger antennae, black tarsi, &c. If distinct from nitidi- 
colUs, it is probably overlooked, as it is only recorded from the 
extreme north of Europe by Zetterstedt, Bonsdorff", and Malm. 
I believe the above 12 species are all that have been recorded as 
European, the first ten are well known to Entomologists, the last two 
are probably overlooked. Crenatus, of Macquart (Dipt, du Nord de 
Erance, 95, 29) might at first be considered to belong to this group, but 
I believe it to be only a synonym of coroUce, as I have specimens of 
the latter agreeing exactly with Macquart's description. 
In the previous descriptions the colour of the hairs is always, to 
a certain extent, yellow, so when I say that the scutellum is clothed 
with yellow hairs, I mean all yellow, and when I say black hairs, I 
-mean some black, generally the majority, as the character is a very 
constant one. 
The Mulberries, Denmai-k Hill, London, S. 
Ifovemher, 1868. 
NOTE ON THE GENUS RTGMODUS, WHITE.* 
BY CHAS. O. WATEEHOUSE. 
Having had occasion to examine the type specimens of the supposed 
Heteromerous genus Eygmodus\ in the British Museum, I find that the 
position of the genus is with the Hydwhiidce, having, I believe, all the 
characters of Hydrohius, except the simple claws ; i. e., the antennae 
are 9-jointed ; the 1st joint being elongate, the 2nd short, thick, 3rd, 
4th, and 5th scarcely longer than the 2nd, sub-equal, 6th very short, 
and 7th, 8th, and 9th forming a club. The abdomen is composed of 
* See " Vojage of the Erebus and Terror," pt. Insects, p. 118. — C. O. W. 
+ The British Museum io now indebted to the liberality of Major Parry for the type specimen of 
R. modeitus. — C. O. W. 
