144 



PROCEEDINGS OP THE ACADEMY OF 



[Feb., 



PSOLOESSA Scudder. 

 Psoloessa texana Scudder. 



If further evidence is needed to support the opinion recently ex- 

 pressed by the authors (Proc. Acad. Nat. Sci. Phila., 1908, pp. 381-383) 

 regarding the impossibility of differentiating the four nominal species 

 of the genus Psoloessa, the one hundred and forty-three specimens 

 examined in this connection furnishes it, The data here given on the 

 variability in this species should be considered supplementary to that 

 presented in the paper mentioned above. 



The typical buddiana type is represented by four specimens, typical 

 ferruginea by nine, typical maculipennis by eleven and typical texana 

 by eight, a total of twenty-three per cent, of the series, leaving an inter- 

 mediate series of one hundred and eleven specimens or seventy-seven 

 per cent., divided as follows; 



A. — Sharing characters of buddiana and ferruginea, one individual. 

 B. — Sharing characters of buddiana and maculipennis, forty-seven 



individuals. 

 C. — Sharing characters of ferruginea and maculipennis, fifty-three 



individuals. 

 D. — Sharing characters of maculipennis and texana, four individuals. 

 E. — Sharing characters of ferruginea and texana, one individual. 

 F. — Sharing characters of buddiana, ferruginea and maculipennis, 



five individuals. 



The distribution by localities of the specimens representing the 

 types of the four "species" and the intermediate groups is as follows: 



El Paso is represented by nine d\ ten ? , July 10 and 11; slopes of 

 the Franklin Mountains by six d\ seven 9, July 9; Alamogordo by 

 two d\ four 9 , July 13; Dry Canyon, Sacramento Mountains, two d\ 



