112 



Journal New York Entomological Society. [Voi. xxviii. 



macher). Siskiyou Co., June i, 1911, female (F. W. Nunenmacher). 

 In the writer's collection there are also two males and three females 

 collected in Mariposa Co., June 6 and 17, 1914, that may not be 

 arcolata as they are very much smaller, expanding from 40 to 46 

 millimeters. 



Platypedia similis new species. Plate V, fig. 6. 



Type male and allotype female from Sonoma Co., California, March 15, 

 1914. Davis collection. 



Resembles Platypedia arcolata. but is smaller and has a differently shaped 

 uncus. 



Shape of head as in arcolata, except that the front is usually a little more 

 prominent. The frontal sulcus is well defined and continuous, whereas in 

 areolata it is interrupted at about the seventh or eighth transverse ridge, with 

 the ridge itself often plainly continuing across the sulcus. The uncus is almost 

 straight for the distal half or more of the lower line except for a subapical 

 sinuation, while the dorsal arch is higher, also more suddenly declivitous at 

 the extremity than in arcolata. The last ventral segment in the male is not 



m 



vy 



Platypedia similis 



as broadly rounded at the e.xtremity as in areolata. The notch in the last 

 ventral segment of the female is the same in both species, that is V-shaped. 

 The body is black with a brassy tinge, and the usual paler marks are 

 yellowish orange as in areolata; the legs are almost wholly chestnut colored; 

 the membranes at the base of the fore wings are almost white, and the venation 

 of both pairs of wings, except about the marginal cells, is pale in the types. 

 The collar or hind margin of pronotum is usually more broadly pale colored 

 than in areolata 



Me.\suremexts in Millimeters. 



Length of body 



Width of head across eyes 



Male Type. 



.. 21.5 

 5-5 



Female Allotype. 

 18 



5-5 



