g40 The Philippine Journal of Science 1923 



resent different species. Both Waterhouse and Chevrolat were 

 misled in this way. Unfortunately, as Behrens 42 rightly says, 

 Chevrolat described part of the material pertaining to this group 

 collected by Cuming at about the same time that Waterhouse 

 did. Several of the species indicated above must be placed as 

 synonyms. In order to recognize some of the more characteristic 

 forms of P. orbifer it seems advisable to retain some of the older 

 names for certain varieties as follows : 

 Pachyrrhynclms orbifer var. inornatus Waterh. Plate 6, fig. 1, $ . 



Uniformly black; elytra dull black, rather strongly coriaceous 

 and regularly punctate-striate. 



Luzon, Ilocos Norte Province, Bangui (Schultze) . Calayan, 

 Babuyanes group (McGregor) . 

 Pachyrrhynchus orbifer var. circulifer Chevr. Plate 6, fig. 2, 5 . 



Black; prothorax and elytra with markings consisting of fine 

 pale green or pink interrupted scale lines. The lines on pro- 

 thorax form a figure like the letter T. On the elytra in basal 

 half the scale lines circumscribe three semicircular areas which 

 are placed in a cross row. Behind the middle another cross 

 row of three areas and a small area at apex. Femora with a 

 scale spot in the middle and another near apex. 



Luzon, Ilocos Norte Province, Bangui (Schultze). 



This variety was described by Chevrolat as P. circulifer; 

 Waterhouse also mentioned this form specially, and in some in- 

 stances he assumed that the specimens were old and rubbed 

 off and resembled P. reticulatus Waterh. subsp. cruciatus Schultze 

 (Plate 5, fig. 3). I examined a large number of perfectly 

 fresh specimens which also give the appearance of being rubbed 

 off. Such specimens have the above indicated fine scale lines 

 and the whole surface is beset with scattered rudimentary scales, 

 except on the bare semicircular areas (Plate 6, fig. 3, female) . 

 In certain specimens this kind of rudimentary scale formation is 

 very faintly indicated, in others it is more pronounced and to 

 such a degree that the bare areas are plainly set off. Such 

 specimens represent intermediate varieties leading up to speci- 

 mens which have the scale formation fully developed, but in 

 which the variations in coloration again are manifold (Plate 6, 

 figs. 4, 6, 7, 8). 



I received numerous examples of these varieties from Bangui, 

 Burgos, and Mount Nagapatan, Ilocos Norte Province, Luzon. 



"Stett. Ent. Zeitg. 48 (1887) 216. 



