OF NORTH AMERICA. 21t 



Expanse of wings, 2.10 inches ; length of body, 0.90 inch. 

 Habitat. — Texas, (coll. Stretch). 



Described from i 5 in good preservation, received from Mr. Bel- 

 frage, who speaks of it as one of the rarest Texan Bombycidae. It 

 has many points of resemblance both to A. virgo and A. achaia. 

 From the former, which it resembles in size, it may be separated by the 

 relative positions of the transverse bands of the primaries to each other, 

 and by the limitation of the pale scales on the veins to the veins them- 

 selves. These do not extend into the disc of the wing as in ^. virgo, 

 but resemble the ornamentation of A. achaia and A. Sawidersii, as 

 pointed out in the latter case by Wm. Saunders, Esq. From A. achaia 

 it is readily distinguished by its much larger size, and the different col- 

 oration of the abdomen. A. intermedia moreover belongs to that sec- 

 tion of the genus in which the thoracic parts are smooth and finely 

 scaled, while A. achaia on the other hand is in this respect more allied 

 to A. virguncula, which has the thorax and its appendages hairy. 



It becomes important to note these differences when speaking of 

 many species of arctia, as although they may have a certain " fascies '' 

 which enables us to separate them at a glance, yet from the uniformity 

 in the pattern of ornamentation, it is frequently difficult to draw a 

 description in words, which shall certainly enable the student to recog- 

 nize the species intended. Many of the earlier descriptions were 

 lamentably deficient in detail and have been the cause of much of our 

 erroneous synonymy. 



9.-ARCTIA ARIZONIENSIS. N. S. (PI. 9, fig. 4, 5 ) 

 3 . — Head yellow-ochre ; palpi black ; antennas brown ; prothorax, 

 patagia, and thorax somewhat hairy, pale whitish yellow ; the patagia 

 each with a black dash, and the thorax with a central black line. 

 Abdomen above pale vermillion, terminal segments black ; beneath 

 black, with a broad ventral pale yellowish stripe. Legs blackish ; 

 coxae of anterior pair hairy, yellow-ochre. 



Anterior wings pale creamy yellow, with the following reduced 

 black spots : two basal streaks ; three irregularly shaped angular sub- 

 costal spots, one of which is on the discal vein, one outside and one 

 inside of the discal vein ; two spots on the outer margin, one apical 

 the other on the second meridian ; a submarginal spot between the 



