194 



[January, 



cimen to be nitens, but it is sccarcely smaller and has the femora 

 quite as yellow as in nitidicollis ; I have very little doubt, however, 

 but that it is a female nitens. The species seems only to have been 

 observed by Zetterstedt and Bonsdorff in the extreme north of 

 Europe. This is most similar in appearance to Utifasciaius, but 

 may be known from that immediately by its black-haired scutellum. 



12. Nigritarsis, Zetterstedt, Dipt., Skan., ii, 710, 11 (1843). This spe- 

 cies differs from nitidicollis 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 tibiae have a faint ob- 

 scure ring. It differs from nitens in the broader abdominal bands, 

 rather larger antennie, black tarsi, &c. If distinct from nitidi- 

 collis, 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 

 France, 95, 29) might at first be considered to belong to this group, but 

 I believe it to be only a synonym of corollce, 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, Denmark Hill, London, S, 

 November, 1868. 



NOTE ON THE GENUS RTGMODUS, WEITE.* 

 BY CHAS. 0. WATEEHOUSE. 



Having had occasion to examine the type specimens of the supposed 

 Heteromerous genus Rygmodus\ in the British Museum, I find that the 

 position of the genus is with the SydrobiidcB, having, I believe, all the 

 characters of Ri/drohius, 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 TeiTor," pt. Insects, p. 118.— C. O. W. 



t Till' Urifish Musouin id now indebted to the liberality of Major Parry for the type specimen of 

 R. mode»iit*.—C. 0. W. 



