1922] NATURAL SCIENCES OF PHILADELPHIA 197 



To the previously established synonymy for the present species, 

 (sinensis Walker, granulosus Stal and truncatifolia Pictet and 

 Saussure), we add the above. 



It appears that the common Philippine insect before us is the 

 species recognized as detersus by Kirby, after examination of the 

 type. The greatest confusion has apparently been caused by 

 Brunner who, failing to recognize the variability of the species, 

 considered the two Philippine species described by Stal to be valid 

 and described two more. The species is exceedingly plastic, as 

 the series of sixteen specimens, now before us, amply demonstrates. 



Baguio, Benguet, Luzon, Philippine Islands, (from C. F. Baker), 

 1 9. 



Polillo Island, Luzon, Philippine Islands, (E. H. Taylor), 2 9. 



Los Banos, Laguna, Luzon, Philippine Islands, (from C. F. 

 Baker), 1 d\ 3 9. 



Mount Makiling, Luzon, Philippine Islands, (from C. F. Baker), 

 1>,3 9. 



Surigao, Mindanao, Philippine Islands, (from C. F. Baker), 1 c?. 



Iligan, Mindanao, Philippine Islands, (from C. F. Baker), 1 cf. 



Dapitan, Mindanao, Philippine Islands, (from C. F. Baker), 1 9 . 



Davao, Mindanao, Philippine Islands, (from C. F. Baker), 2 9 . 



Singapore, British Straits Settlements, (from C. F. Baker), 1 cf . 



The present insect is subject to very great individual size vari- 

 ation, irrespective of geographic distribution. Stal gave 39 to 58 

 mm. for length including tegmina, for this dimension the present 

 series shows the following extremes; cf 34.5 to 42.5, 9 40 to 68 mm. 



The tegminal venation is irregular and the branching of the 

 veinlets of the scapular field (used as a specific character by 

 Brunner) particularly so. 



Though usually with a black spot meso-proximad between the 

 median and ulnar veins of the tegmina, individuals without this 

 spot occur, others showing it reduced to different degrees. 



In the smallest and one of the largest females at hand, the caudal 

 femora distad and caudal tibiae are purplish pink. A rather 

 similar individual color variation apparently constituted one of the 

 reasons for Brunner's describing rufatus. 



The measurements (in millimeters^ of selected specimens from 

 the series before us are as follows : 



