314 Mr. A. G. Butler on a new 



rately represent the number of joints, or that they vary in 

 different individuals of the same species. A second difficulty 

 lies in the character given to the genus Phrynichus as compared 

 with Charon ; for either Dr. Karsch has reckoned the meta- 

 tarsus as a fourth tibial joint, making three posterior tibial 

 joints, in which case the genus Phrynichus, according to our 

 specimens, exists only upon paper ; or he has not reckoned 

 the metatarsus as a tibial joint, in which case the genus 

 Charon ceases to exist. 



As I consider that the metatarsus is not a true tibial joint, 

 although in Phrynus it often looks like one, I shall regard 

 the genus Charon as non-existent, and see how far our ex- 

 amples confirm Dr. Karsch's statements respecting the number 

 of species referable to each genus. Before doing this, how- 

 ever, I may state that I have again compared our specimens 

 witli the published figures and satisfied myself that they were 

 correctly determined when my monographic revision of the 

 genus was published. I have also discovered that Herbst 

 invariably, and Koch almost invariably, figures a Phrynus 

 without posterior tibial joints to the fourth pair of legs. 



The examples in the Museum, then, are as follows : — 



Phrynichus, Karsch. 



P. scaler, Walck. (Round Island). 

 P. lunatus, Fabr. (Natal). 

 P.fuscimanus, Koch (Columbia). 



According to Koch's figures we should have to add P. 

 nigrimanus, P. marginemaculatus (figure agrees with P. 

 lunatus), P. variegatus, P. reniformis, P. palmatus, and P. 

 ceylonicus ; and according to Herbst, P. medius, P. pahnatus, 

 and P. reniforme. The only conclusion, therefore, that I can 

 rationally arrive at with regard to Dr. Karsch's observation 

 that " the genus Phrynichus, as it appears, has the most 

 species " is, that the species have not been seen in nature, but 

 only in the published figures, which are not correct. 



Damon, Karsch. 



P. palmatus, Herbst (Mexico and Columbia) . 



P. annulatipes, Wood (Zulu country, Natal, Cape). 



P. Grayii, Gervais (Manilla). 



P. bassamensis, Lucas (West Africa, Congo). 



P. medius, Herbst (Fernando Po, Sierra Leone) . 



P. Kochii, Butler (America). 



Here, again, we have six species in place of one. 



