616 TAGE oKOUSBEKG 



no lateral corner glands, not only in the species of this group, but in no less than 23 species 

 belonging to several different groups. 



First antenna: — It is especially on this antenna that G. W. MULLEli bases his 

 grouping together of the species mentioned above. ,, Character istisch fhr die Gruppe ist die 

 Bewaffnung der Hauptborste in beiden Geschlechtern" (1906 a, p. 56). In the females of these 

 species the e-bristle on this antenna is furnished with ,,langer, diinner, stark abstehender Be- 

 haarung am Vorderrand". There are no such hairs in C. dasi/ophthalma; this species is con- 

 sequently included here only with hesitation. 



It is probably best, however, not to attach too much importance to this character, as 

 I have observed that similar hairs are characteristic of the female of C. sfinirostris as well, 

 i. e. a species that G. W. MtJLLER referred, though with hesitation, to quite another group of 

 this genus, namely the Magna group, and they are also found in C. obtusata*. Does C. spini- 

 rostris belong to the Magna group or is this doubt of G. W. MUllbr's justified? It seems to me, 

 unfortunately, impossible to answer this question on account of the comparatively slight know- 

 ledge I possess of the majority of the species belonging to the Magna group. On the other hand 

 it seems to me beyond all doubt that C. sfinirostris is not more closely related to C. oblonga 

 than many other species belonging to other groups of this genus. Anyone who knows C. obtusata 

 and C. oblonga will understand that there is no specially close relation between these two species. 



In the males of the Spinifera group the e-bristle is furnished with ,,langen, borstenartigen 

 Spitzen; dieselbeu stehen meist sehr dicht, riicken nur ausnahmsweise (echinata) etwas weiter 

 auseinander; distal von den basalwarts gerichteten Borsten findet sich meisc (Ausnahme dorso- 

 tuberculata, allotherium, mamillata) eine kleine Gruppe distalwarts gerichteter Borstchen" 

 (G. W. MDller, 1906 a, p. 56). 



With regard to these characters it may be pointed out, first, that long, bristle-like, close 

 spines are not characteristic only of species of this group, but of a very large number of species 

 belonging to several other groups of this genus; we are presumably concerned here, too, with 

 a comparatively primitive character; cf. also this character in 0. dasyophthalma, pi. XI, fig. 30, 

 Nor is the character of a small group of distally pointing spines situated distaUy of the rows 

 of spines confined to this group; similar spines are found in several other species of this genus 

 belonging to different groups; the exceptions within the groups are also, of course, considerably 

 numerous. Nor can the armature of the b- and d-bristles as put forward by G. W. MCller 

 be conveniently used; there are exceptions within the group and we find a similar character 

 in a very large number of species in many other groups of this genus. 



Mandible: — • ,,Kauwulst der Mandibellade in Form einer quergestellten dreiseitigen 

 Zahnplatte iiber die ganze Breite der Kauflache ausgezogen, die vier Hakenzahne zur Seite 

 gedrangt, in dem dichten Borstensaum mehr oder minder versteckt." (C. Clx.\US, 1891 a.) 

 This character is not included at all by G. W. MULLER. With regard to the value of this character, 

 which applies, of course, only to the three first-mentioned species, it is difficult to make any 

 definite statement, but it is presumably rather slight, as the differences we are concerned with 



* In a largo uuinlR^r of species tlieie are exceedingly sliorl, distally poiuting hairs at this place. Such species are 

 C. lUegaiis, C. rutundata, C. liaddoni, C. hispinosa, C. Gaussi, C. serrulala and C. Chuni. 



