102 INSECUTOR INSCITI^ MENSTRUUS 



from Wood's very complete description. In Malloch's key 

 to North American species it will fall near ciliata on account 

 of the enlarged bristle (or two) on the mesopleura. A. nasoni 

 recently described by Malloch (Bull. Brooklyn Ent. Soc, vol. 

 9, p. 58 (1914) ) will also run to ciliata in the same key, but 

 is very different from pleuralis although strangely enough it 

 also was obtained by Dr. Nason at Algonquin, where the speci- 

 mens of pleuralis were collected. I have additional specimens 

 from Lyndon, Washington, July 39, 1908 (A. L. Melander), 

 from Milton, Massachusetts, and from New Bedford, Massa- 

 chusetts. 



Aphiochaeta subpleuralis Wood. 



Entom. Monthly Mag., vol. 20, p. 118 and 146 (1909). 

 I have a single male which I think is this species, as it de- 

 parts in no way from Wood's comprehensive description. 

 Wood says that this is a common and widely distributed species 

 in Great Britain and that it is probably the pulicaria of Meigen 

 and Becker, but not of Fallen. It seems probable, therefore, 

 that this is an abundant palsearctic species that extends into 

 western North America, particularly as Becker records his 

 pulicaria from Siberia as well as Europe. 



Aphiochsta beckeri Wood. 



Entom. Monthly Mag., vol. 20, p. 115 and 144 (1909). 

 A single male from Moscow Mountain, Idaho, sent me by 

 Professor Melander, seems to be this species, hitherto known 

 from Great Britain. The American specimen has the palpi 

 almost black as well as the anal organ, and the tibial cilia, 

 although well developed, could hardly be considered as sparse. 

 I can make out no other differences, however, from Wood's 

 description. The species is rather conspicuous on account of 

 its very broad front, strong bristles on the head and propleurse, 

 the bristling of the hypopygium and the color and venation of 

 the wings. 



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