THE CANADIAN ENTOMOLOGIST. 69 



eastern or Antillian tread of diffusion has greatly affected the Sphingid 

 fauna of America north of Mexico. I cannot leave the subject, however, 

 without caUing attention to the fact that Soutii American forms make their 

 way into the United States by several lines of diffusion. A species may 

 make its way up through the Windward and Leeward Islands and the 

 larger islands of the West Indies into Florida ; it may make its way 

 northward through Panama to Honduras, and thence through Cuba to 

 Florida, or continue northward through Central America and Mexico, 

 sometimes both, but in the latter case we are likely to find it in both 

 Florida and Texas. With the Sphingidae it would seem that the species 

 had for the most part either followed the Antilles, or crossed over from 

 Honduras, and entered the United States by way of Florida, sometimes 

 holding closely to the Atlantic coast, and in other species spreading west- 

 ward around the lower extremity of the Appalachian Mountain system. 

 But, excepting those species that we know have been introduced from 

 other countries within the temperate zone, we can trace almost every 

 North American species of Sphingidae, either directly or by closely-allied 

 species, to their ancient and original home in tropical South America, and 

 of the doubtful remainder there are kw indeed that cannot be traced 

 into Mexico, where we lose track of them in the obscurity surrounding 

 the entomological fauna of that country. 



CONCERNING SOME PHILIPPINE MOSQUITOES. 



BY C. S. LUDLOW, M. SC, EASTON, PA. 



In connection with the work on the Philippine mosquitoes carried on 

 by the authority of the Surgeon-General, U. S. Army, and " for and with 

 the co-operation of the Medical Corps, U.S.A.," a lot of mosquitoes recently 

 received from Cottabato, Mindanao, P. I., makes it possible to describe a 

 new Myzomyia ; to state definitely all the differences between Stegomyia 

 scutellaris, Walker, and the variety Sutnarensis, Ludlow ; and to make a 

 small correction in the description of Myzorhyncus pseudobarbirostris^ 

 Ludlow. 



Myzomyia Thorntonii, n. sp. — Female : Head dark brown, with tuft 

 of white scales on the vertex, and white hairs projecting forward between 

 the eyes, a few white scales around the eyes ; antennae brown, verticles 

 and pubescence white, basal joint testaceous, a {Q\i white scales on first 

 and second joints ; proboscis brown on basal half, apical half dull yellow, 

 with narrow brown band at apex, tip dull yellow ; palpi, ultimate joint 



