144 THE CANADIAN ENTOMOLOGIST. 



slight greenish tint ] caudal horn purple-blue, except the sides which are 

 a continuation of the lateral stripe ; jaws black, clypeus and anterior feet 

 pale red ; head blunt, stripe yellow ; stripes on anal appendages yellow. 

 Duration of this period 6 days. 



Chrysalis. — Length 1.35 inches ; to the back of wing cases, .64 inch ; 

 and this extends to posterior part of joint 5 ; depth through joint 5, .42 

 inch ; through 4, .40 inch ; through 3, .39 inch ; through 2, .37 inch ; end 

 of tongue case, .55 inch from the anterior end. Cylindrical, tapering 

 gradually back from joint 5, cremaster triangular tuberculate, especially 

 on the dorsal part and on sides at base, round dorsally and flattened 

 ventrally, no hooks but slightly forked terminally ; head rounded. Colour 

 chestnut-brown, nearly uniform ; wing, tongue and leg cases a little darker 

 than the rest ; the abdomen slightly punctured. Duration of this period 

 15 to 17 days. 



A comparison of the pupse of this species with Geininatus shows the 

 following differences :— The cremaster on Gemmatus is triangular, more 

 slender, less roughly tuberculate dorsally and laterally ; this in Ophthal- 

 micus having a distinct tubercle each side at the base that is lacking in 

 Geminatus. The cremaster in Geminahis is nearly conical by reason of 

 its being only slightly flattened ventrally, while in Ophthalmicus it is 

 distinctly flattened ventrally, and dorsally is contracted at the base. A 

 chrysalis of Gemitiatus measures as follows : Length 1.15 inches; depth 

 through joint 5, .40 inch ; joint 4, .38 inch ; joint 3, .37 inch ; length to 

 end of wing cases, .60 inch j to end of tongue case, .48 inch. A comparison 

 of these figures with the measurements of Ophthalmicus shows a different 

 proportion between the two pup^e. The pupa skin is about twice as stiff 

 in Geminatus as it is in Ophthalmicus. Besides this, the larva of Oph- 

 thalmicus differs from that of Geminatus in being less cylendrical, the 

 third and fourth joints being enlarged, thereby making it resemble the 

 larvae of Everyx Afyroti. 



The food plant is the same as that of Gemifiatus. 



The larvae from which the above descriptions were made were received 

 from the Hon. C. F. McGlashan, of Truckee, California. They were sent 

 as eggs June 17 th, 1889, but were received hatched June 22nd. The 

 imagines were produced August 2nd and 3rd of the same year, making a 

 total period from egg to imago, of the summer brood, of 47 days. The 

 time of hatching shows that there are two broods in a season, 



