220 THE CANADIAN ENTOMOLOGIST. 



PAMPHIT.A MANITOBOIDES, FLETCHER, AND PAMPHILA, 



SASSACUS, SCUDDER. 



BY HENRY SKINNER, PHILADELPHIA. 



Since our visit to Nepigon last July, Dr. Fletcher and I have been 

 greatly interested in these two insects. The amount of material in 

 Manitoboides has been limited until this recent trip. Last year we captured 

 a few specimens at Nepigon, and Dr. Fletcher has sent me four males and 

 six females. I had in addition five males and eisht females. I have 

 compared these specimens with a series of sassacus from Pennsylvania, 

 New Jersey, New York and New Hampshire, and have arrived at the 

 conclusion that Manitoboides is a geographical race, topomorph or 

 subspecies o{ sassaais. There is a very great difference between the two 

 when extremes are selected, but the intergrades show their relationship. 

 In the male ( Manitoboides jih&Xxmh?^^^ area of secondaries above is greatly 

 restricted as compared with sassacus. The under side of secondaries in 

 sassacus is immaculate in some specimens, and the contrast between these 

 and the heavily-spotted under side of Maiiitoboides is very striking. The 

 differences mentioned are gradational through a series. The stigma, 

 antennas, etc., are identicah The Nepigon specimens show considerable 

 variation among themselves. According to evolution these are the things we 

 expect to find. If future studies and study of the life-histories prove my 

 conclusions erroneous^ I at least think it well to call attention to their very 

 near relationship at this time. 



It is gratifying to learn that both Houses of the United States Con- 

 gress have concurred by a unanimous vote in granting an annuity for life 

 of $1,500 each to the widows of the late Major James Carroll, Surgeon in 

 the U. S. Army, and the late acting Assistant Surgeon, Jesse W. Lasear, 

 whose lives were sacrificed to duty in the study of the transmission of 

 yellow fever in Cuba by the mosquito Stegoniyia fasciata 



A Synopsis of the Genus Pemphigus, with notes on their 

 economic importance, life-history and geographical distribution, by C. F. 

 Jackson, Ohio State University. 



This very important and extremely useful paper has just been 

 received. The author deals with the characteiization, history of the 

 formation, general anatomy, habits, life-history and derivation of the genus, 

 and gives a key to the genera of the family Aphididse, with an appended 

 key to the species of the genus Pemphigus and a synopsis of the species, 

 >vith notes on their economic importance. — [T. D. Jarvis. 



