380 PROF. E. E. LAXKESTER ON CERTAIN POINTS IN THE 



Genus 2. Telegoxus. 

 Sternum compressed antero-posteriorly, and thus more or less completely divided into 

 laterally expanding narrow lobes or bands. 



Subgenera % (PI. LXXXII. figs. 4, 5.) 



Subfamily II. Androctoxini. 



Sternum (metasternite) triangular. 



Nerves to the regions of both the first and second pair of lung-books descending from 

 the prosomatic ganglion-mass. The first detached ganglion of the mesosoma lies in its 

 fourth segment, and supplies nerves to the following segment. 



Ornament of the lamella? of the lung-books reticulate as well as punctiform. 



A double row of teeth to either both rami of the chelicerse or to the movable ramus 

 only. 



Genus unicum. Androctonus. 

 Char, of the subfamily. 



Subgenus Prionurus. 



Char. Two rows of teeth to each ramus of the chelicerse ; tail very thick ; hand 

 rather slender (compared with Scorpio). 



Types: Prionurus ficnestus, Ehr. : North Africa. (PI. LXXXII. fig. 2 ) 

 Prionurus occitanus ; the yellow Spanish Scorpion. 



Subgenus Centrurus. 



Char. Two rows of teeth to the movable ramus only of the chelicera ; a single tooth 

 of a second row present in the fixed ramus sometimes ; tail very long and slender, some- 

 times with a spine below the sting ; hand very slender. 



Types: Centrurus americanus, De Geer. (PI. LXXXII. figs. 6, 13, 17.) 



Centrurus hottentotus : South Africa. (PL LXXXII. figs. 7, 11, 18.) 



The facts of geographical distribution, so far as they are known, give some import- 

 ance to the divisions thus recognized. The Scorpions of the Palsearctic and Indian 

 regions are essentially those of the genus Scorpio. In the Ethiopian region we have 

 both the genera Scorpio and Androctonus, the latter making its way into Spain, and to 

 some extent into the Indian region. 



In America we have both Scorpio and Androctonus. 



The species of the genus Telegonus appear to be confined to South America and 

 Tasmania. 



I confess to not being at present in a position to offer an opinion upon the questions 

 of species and subgenera in very many cases. It is necessary thatall the described forms 



