SYNOPSIS OF NORTH AMERICAN SYRPHIDJS. 301 



tabular synopsis, should have been given. It is very much to be feared 

 that Mr. Bigot's long interrogatioual list will remain an incumbrance to 

 Mexican dipterology. 

 Myiolepta lunulata, Anuales, 1884, 537.— Oregon. 



Is the same as M. varipes Loew. 

 Brachyopa cinereovittata, Anuales, 1884, .537. 



This seems to be B. vacua , but the description of the thorax does not 

 agree well. 

 Paragias auricaudatus, Auuales, 1884, 540.— California. 



This I identify with the common European P. tihialis. 

 Xylota rubiginigaster, Annales, 1884, 543.— Colorado. 



I have immature specimens of X. pigra to which this description will 

 apply fairly well. 



Xylota annulifera, Auuales, 1884, 545.— North America. 



I do not see wherein this species differs from the common X. ^uncida 

 Say. 



Xylota satanica. Annales, 1884. 54(;.— California. 



This description applies to X. curvipes except that the black of the 

 tip of the hind femora is not mentioned. PoSvSibly it is distinct. 

 Glaurotricha (Haurotricha) volucelloides, Annales, 1884, 548.— Mexico. 



The author is in doubt whether to call this a Glaurotricha or a Phal- 

 aeromyia. The genus corresponds to Temnocera, but with the marginal 

 cell open as in Phalacromyia. 

 Cartosyrphus lamprurus, Anuales, 1884, 552.— North America. 



This is evidently Ghilosia capillata Loew. 

 Cartosyrphus hoodianus, Annales, 1884, 552.— Mount Hood. 



See Chilosia hoodiensis above. 



Cartosyrphus infumatus, Annales, 1884, 55:5.— Mount Hood. 



Is the same as Chilosia nigripennis. 

 Cartosyrphus laevis, Annales, 1884, .5.53.— Washington Territory. 



See Chilosia Iwvis above. 



The genus Cartosyrphus was characterized by the author as follows: 

 " Generis Chilosia' veteris simillimum ; diferi, cheto et oculis glahrisP 

 Melanogaster rufipes, Aunales, 1884, .555.— North America. 



I am unable to locate this species any more definitely than the nuthor 

 has done. The author's conception of the genus will be ascertained from 

 the following, from his tabular synopsis of the genera oi" Syr]ihidfe 

 (Ann. Soc. Ent. Fr., 1883, 258) : 



^' Face d^pourvue de sillons lateraux ; antennes, 3*^ segment de grande 

 dimension, orbiculaire: 5 , yeux contigus. Cartosyrphus. Id., 5 , pour- 

 vue de sillons lateraux; antennes, 3« segment de mediocre dimension. 

 Melanogaster^ 



