LEPIDOPTERA. 343 



they are black with a common white band near their 



middle; and the discal 

 veins are usually white 

 and broadly bordered with 

 black. There are great 

 variations in the width of 

 the white band on the 

 wings. The larva feeds on 

 the leaves of oak; it is 

 brownish black, with a lat- 



FlG. 421. Hemileuca ttiaia. i 11 



eral yellow stripe ; and is 



armed on each segment with large branching spines. This 

 species pertains to the eastern part of the continent ; but 

 there are several western species belonging to the genus. 



In the West there occur also two species of the genus 

 Pseudohazis (Pseu-do-ha'zis). These are P. hero. (P. he'ra), in 

 which the ground-color of the wings is white (Plate IV), and 

 P. eglanterina (P. eg-lan-te-ri'na), in which the ground-color 

 is brown. Both species are spotted and striped with black. 

 In each the abdomen is ringed with black ; there is a large 

 discal spot on each wing, which frequently has a white center 

 due to white scales borne by the discal vein. The base of 

 the wings is dusky. There is a transverse band at the end 

 of the basal third, which is sometimes wanting on the hind 

 wings ; and a broader, wavy, transverse band crossing both 

 wings at the end of the basal two thirds ; and on each wing 

 there is a series of six or seven triangular black spots situ- 

 ated on the ends of the veins, at the outer margin of the 

 wing. It should be said that both in the ground-color and 

 in the markings these two forms vary much ; and it is possi- 

 ble that they are merely varieties of one species. 



Family ClTHERONHD/E (Cith-e-ro-ni'i-dae). 



The Royal-moths. 



The Royal-moths are stout-bodied and hairy, with sunken 

 heads and strong wings. The species are of medium or large 



