210 THE CANADIAN ENTOMOLOGIST 



extended without particular definiteness and extend deep into the wood or near 

 the bark, and become much convoluted affairs. The result is a fatal girdling. 

 Dark reddish-brown spots often form on the bark above where the tissue is 

 riddled. Various species of birch are attacked. Mr. W. F. Turner records 

 this species as infesting pecan. Burke states that it attacks poplars, cotton- 

 woods, aspens and balm-of-gileads. Galls on branches of willow (Davis). 

 On poplar leaves and ovipositing in trunk of living poplar (Frost). Where 

 the references refer to birch and poplar, they are undoubtedly correct, but 

 there is a possibility of anxius having been confused with other species where 

 other food plants are mentioned. 



A. acutipennis Mann. 



Blanchard, Ent. Amer., Vol. V, p. 32, 1889. 



Blanchard, Tr. Am. Ent. Soc, Vol. XVIII, p. 308. 



Chittenden, Bui. 22, n. s., U. S. D. A., Div. Ent., p. 67, 1900. 



On foliage of oak shrubs (Blanchard). On foliage of Corylus americana 

 and red oak (Frost). 



A. auricomus Frost. 



Frost, Can. Ent., Vol. XLIV, p. 250, 1912. 



A. couesii Lee. 



Chittenden, Bui 22, n. s., U. S. D. A., Div. Ent., p. 67, 1900. 

 Cockerell, Jour. N. Y. Ent. Soc, p. 150, 1897. 

 On Mentzelia nuda (Cockerell). 



A. pulchellus Blanch. 



Chittenden, Bui. 22, n. s., U. S. D. A., Div. Ent., p. 68, 1900. 

 Breeds in roots of Erigeron (Hubbard & Schwarz). 



A. cephalicus Lee. 



Knull, Ent. News, Vol. XXXI, p. 10, 1920. 



Reared from sapwood of dead dogwood {Corniis florida) (Knull). On 

 leaves of Corylus americana (Frost). 



(To be continued.) 



DR. SEYMOUR HADWEN. 



It will be regretted by many Entomologists and others throughout Canada 

 that Dr. Seymour Hadwen, Pathologist of the Health of Animals Branch, 

 Dominion Department of Agriculture, tendered his resignation and left Ottawa 

 about the middle of June. He is to be congratulated, however, on being 

 appointed Chief Pathologist of the United States Biological Survey. Dr. 

 Hadwen, accompanied by Dr. Nelson, Chief of the Biological Survey, sailed 

 for Alaska, from Seattle, on July 1st, to undertake a series of studies on the 

 diseases affecting the reindeer and caribou. Dr. Hawden will have several 

 technical assistants with him, and a complete laboratory outfit from Washing- 

 ton accompanied the party. Their headquarters will be about one hundred 

 miles inland from Nome. — Adapted from the "Entomological Branch News 

 Letter." 



