534 D. J. SCOURFIELD, SYNOPSIS OF THE KNOWN SPECIES OF 



C. leuckarti Glaus [Schmeil (44) ; Brady (36) = C. scourJieldi\. 



C. scourjieldi Brady (36), Scourfield (26). 

 C. oithonoides Sars [Schmeil (44) ; Brady (36) = C. scourjieldi 



var.]. 



C. scourjieldi var. Brady (36), Scourfield (26). 



The variety ^^ hyalinus,'^ admitted by Lilljeborg (40) as a 

 distinct species, occurs as well as the typical form. 



Not yet found in Scotland. 

 C. dybowskii Lande [Schmeil (44)]. 



According to Lilljeborg (40) this ought to be known as C, 

 crassus Fischer. 

 C. bicuspidatus Glaus [Schmeil (44) ; Brady (36) = C. thomasi\ 



The variety '•'■ luhhockii " Brady \_= C. iiisignis Brady (35, 36)], 

 with fourteen- jointed antennae, is only found in or near brackish 

 water. 



C. languidus Sars [Schmeil (44)]. 

 C. langiiidoides Lilljeborg [Lilljeborg (40)]. 



This has been found recently by Mr. Kobert Gurney in the 

 " Broads " district, but has not hitherto been recorded. It is very 

 closely related to the following species. 

 C. nanus Sars. 



Prof. Sars has very kindly examined specimens for me, and 

 says they unquestionably belong to the C, nanus described in his 

 " Oversigt " in 1863. As no figures of this species appear to have 

 yet been published, illustrations of a few details will, if possible, 

 be issued with the next part of this paper. 



Recorded by T. Scott from two or three places in Scotland 

 (20). I have also taken it in Scotland, and I believe also near 

 London ; Dr. and Miss Sprague inform me that they have seen 

 it in the Lake District. 

 C. vernalis Fischer [Schmeil (44)]. 

 ? C. elongatus Brady (36). 



The C. kaujmanni of Brady's " Monograph " and " Kevision " 

 (35, 36) is probably the immature male of this species, but young 

 males of C. viridis, etc., are very similar. 



C. bisetosus Rehberg [Schmeil (44) ; Brady (36) = C. hicusjndatus^ 

 C. viridis (J urine) [Schmeil (44) ; Brady (36)]. 

 C. gigas Brady (35). 



Lilljeborg (40) regards C. viridis and C. gigas as distinct species, 

 but I often find specimens combining the characters of both. 



