20 ENTOMOLOGICAL SOCIETY 



Island, synonymous with alni. However, this is not the case. 

 Larvae from Victoria, Shawnigan Lake and Wellington, B. C., 

 have black dorsal tufts on a yellow field when young, and these 

 tufts persist in the mature larva, but in a brownish yellow field, 

 thus showing a form of larva distinct from any previously known 

 in North America. Walker's name angulifera may be used 

 for it. The form occurs also on the mainland, at Vancouver, 

 B. C., according to information furnished by Mr. R. V. Harvey. 

 Mr. H. S. Barber has collected quite a series of H. maculata 

 at Eureka, California. Without the larva I am unable to say 

 whether they should be referred to alni or angulifera. But 

 aside from this matter there is represented among them a very 

 curious variety, which I describe as follows : 



Halesidota maculata, variety eureka, n. var. 



Entirely suffused with brown, all the marks obliterate. Thorax brown, 

 showing a faint lighter shade on vertex of head, patagia and disk. Fore 

 wing brown along costa, inner magin, discal dot and a broad shade be 

 yond it, the rest of the wing lighter yellow brown ; hind wing whitish 

 yellow. Except for the brown tone, it strongly suggests H. bicolor 

 Walker {pura Neumoegen). 



Three c?d% Eureka, Cal. (H. S. Barber). 

 Type. No. 6983, U. S. National Museum. 



Specimens of moths and larvae were exhibited. 



Dr. Dyar showed, also, microscopic slides of the larval and 

 pupal skins of the mosquitoes Megarhinus rutilus Coquillett 

 and M. portoricensis Roeder, and commented upon the structure 

 and systematic position of the larvae. The slides were prepared 

 by Mr. F. C. Pratt, who had bred the species at Woodstock, 

 Virginia, the past summer. All the males reared belonged to 

 rutilus while the females were portoricensis. Dr. Dyar said 

 that he had examined Mr. Pratt's slides with some care and 

 could not detect the slightest difference between the skins of M. 

 portoricensis and M. rutilus. He presented the following de 

 scription of the larvae : 



THE LARVAE OF THE MOSQUITOES MEGARHINUS RUTI 

 LUS COQUILLETT AND M. PORTORICENSIS RCEDER. 



By HARRISON G. DYAR. 



The head is rounded, C^/<?#-shaped ; the mouth -brush con 

 sists of a pencil of stout curved spines, each with a little claw at 



