66 THE CANADIAN ENTOMOLOGIST. 



allied to South American forms. Of the remaining 34 species, many can 

 be traced into Mexico, where, owing to lack of knowledge of the insect 

 fauna, they are lost in obscurity. 



Taking up the genera, and following Dr. Dyar's recent List, because 

 of the more definite information given relative to the distribution of the 

 species, we find many interesting facts. In the genus Hemaris we have 

 one species occurring over the eastern portion of the country with vari- 

 eties scattered from the Pacific Northwest through British Columbia and 

 California to New Mexico ; another occurs in Colorado and Utah ; the 

 other two from Labrador and Canada to Florida, and west to the 

 Mississippi river. Some day we may find out that the Pacific coast and 

 south-western forms are more remote from the eastern forms than we now 

 suppose, and have had their origin in the west, while we may be able to 

 find a similar connecting link between the eastern forms and the 

 stem species from which both branches have evolved, somewhere in 

 Central America, or north-west South America. The genus Lepisesia has 

 one species in arctic America ; another ranging from Northern California 

 to Utah ; one in Southern California ; one generally distributed over the 

 Southern States ; one each in Texas and New Mexico, and another 

 extending from Mexico into Georgia, all of which indicates a northern 

 trend of diffusion from Mexico or beyond. The three genera, Aellopos, 

 Triptogon and Calliomma, each with a single species ; the first inhabiting 

 South America and the Southern States ; the second South America, 

 Mexico, West Indies, Florida and occasionally northward, and the last 

 being found also in South America and Florida. The next three genera, 

 Amphion, Sphecodina and Deidamin, each with a single species, the first 

 ranging from Florida to Canada, and west to Iowa ; the second and third 

 having much the same habitat. Deilephila has two species, both 

 introduced, but the genus is represented in South America also. The 

 genus Theretria has two species, one ranging from South America, 



Central America and the West Indies, through the Southern States and 

 nortii into Canada, while the oiher is found in both South America and 

 Florida. Argeiis, with a single species, occurs in South America and 

 Florida, northward along the cost to Canada, though it is rare north of 

 Florida. Pachylia^ likewise with a single species, is found in South 

 America and Florida. Pholus ( Philampelus) with five species, two 

 ranging from South America through Central America, Cuba and the 

 Southern States, northward along the eastern coast to New England ; 

 another generally distributed over the entire United States and Canada, 

 and another covering the country east of the Great Plains ; the fifth and 



