76 



erances of the abdouien had only one feathered hair ; the other 

 so called feathered hair, delineated by me in the Tijdschrift voor 

 Entomologie, vol. 43, p. 109, tab. 5, Fig. 1, is nothing but a 

 feather-shaped exsudation of wax on one side and the removed 

 broken feather of the corner of the abdomen on the other side (my 

 figure does uot show these feathers on the corners). Further 

 Michael's drawing shows a little hair behind the central depres- 

 sion, on each side. I have found it in my specimen too. 



Observations : 



1. Jnst as I have been mistaken in the interpretation of the 

 number of hairs of the protuberances of the abdomen, others 

 may have been so too. Yet this supposition is not a proof that 

 Nicolet and Berlese were wrong in delineating their Nothrus 

 horridus with tivo hairs on the protuberances. And therefore we 

 are obliged to adopt their species, but to change their names, as 

 I already did (Tijdschrift voor Entomologie, vol. 43, p. 109 and 110). 



2. The wriukles in the skin of my specimen are arranged other- 

 wise than in Michael's. In my specimen the edge of the central 

 depression is anteriorly indistinct; and the depression is not 

 divided by a transversal ridge. Yet I consider my specimen 

 perfectly identical to Michael's Camisia biverrucata (C. L. Koch). 

 In vol. 43, p. 111, of the Tijdschrift voor Entomologie I said: 

 »I believe that these ridges are of no great value, and that they 

 will disappear the more the animal is fed. But 1 have no material 

 to settle the question." Of this there can now be hardly any doubt. 



3. So contrary to my opinion expressed in the above mentioned 

 volume, I now consider Nothrus horridus of Nicolet (Arch. Mus. 

 Par. vol. 7, tab. 31, Fig. 1) identical to Nothrus horridus of 

 Berlese (Ac. Myr. Scorp. Ital. 17, 1), but I have no reason to 

 doubt the identity of this species to Nothrus horridus of Her- 

 mann and Michael, and to Nothrus biverrucatus (C. L. Koch) of 

 Michael. It is true that the shape of the pseudostigmatic organ 

 of the species in question corresponds to that of biverrucatus, 

 but the presence of two feathered hairs on the abdominal apophyses, 





