226 Mr. Weslvvood on the Jj^nities of Clinidium. 



The accurate examinations and descriptions of Gyllenhal throw, howe- 

 ver, some light upon the formation of these organs, and accordingly we 

 find the following observation in the Addenda to the first volume of the 

 Insecta Suec, Vol. II. p. 6, (misprinted 4.) " Secundum observationes 

 " CI. Dom. Schonherr, in Act. Holm. 1809. pag. 52, et sequ. plurimae 

 " species Generis Cucuji tarsos gerunt omnes 5-articulatos, ideoque heic 

 " [Pentamera] inseratur Familia 9-10 : ma Cucujipes." This reference 

 being unfortunately incorrect, I have not been able to make that use of 

 Schonherr's observations which I could have wished ; and in the charac- 

 ters which Gyllenhal has given of the genus, we find " Tarsuum articulus 

 " primus minutus inferus stipuliformis," with the additional observation 

 upon Cue. depressus, " In altero sexu, forte masculo, tarsi postici tantum 

 *' 4-articulati, primo minuto stipuliformi, secundo elongato cylindrico, 

 " tertio brevi sub-bilobo, quarto unguiculari longo clavato." 



In my specimen of Cue. depressus the joints of the tarsi are exactly as 

 represented in fig. 5, F, G and H. Regarding, therefore, the last observa- 

 tion of Gyllenhal to be correct, we are led to consider that in all other 

 respects a similar formation of organs (including, of course, the anteniusj 

 is observed in the sexes, since, if this had not been the case, Gyllenhal 

 would most certainly have apprized us of the differences. The compa- 

 rative smallness of the second joint, and the very slight incrassation of 

 the last three joints of the antennae of this species will be perceived in 

 fig. 5, A. 



In the British species Cue. dermestoides, which is well figured by Pan- 

 zer, 3, B, there are several peculiarities of formation, which distinguish 

 it from Cue. depressus. In shape it is more oblong. The hinder angles 

 of the head are not so much produced. Its antennce are shorter, with 

 the second joint nearly as large as the third, the eighth small, and the 

 three following incrassated, (Tab Supp. xlvi, fig. 6, A.) The mentum is 

 different, the anterior margin being pointed in the middle (Ibid. E.), and 

 the last joint of themaxillary and labial palpi, although truncate at the 

 tips, is not obconic (Ibid. C. and D.) According to Gyllenhal, however, 

 the posterior tarsi vary according to the sex, as in Cue. depressus, and as 

 no other variation is noticed by that author, we may conclude that the 

 antenncB do not vary in the sexes. Upon the affinities of this insect 

 Clyllenhal observes, " Antennarum et scutelli structura, ut et articulorum 



