134 MOSQUITOES 



stucV of tlie morphological features of these insects. 

 Without knowing- the results of the American Commission, 

 Mr. Theobald had decided that Culex fasciatus or tamiatus 

 is not to be contained in the genus Culex, but that on 

 account of scale structure and other structural peculiarities 

 it must be placed in another genus for which he has pro- 

 posed the name of Stegomj^ia. A few other species for- 

 merly placed in the genus Culex he also puts in this new 

 genus of his, which arouses the iDresumption that they 

 also may be capable of transmitting yellow fever. At all 

 events, we have here a most interesting and suggestive 

 co-relation between obvious structural peculiarities and 

 pathological possibilities. 



Stegomyia fasdata, as we must now, at least for the 

 present, call the only yellow-fever mosquito about which 

 we are at all certain, is an inhabitant of the warmer por- 

 tions of the globe. Mr. Theobald writes me that it occurs 

 in abundance in Cuba and all the West Indies, and that 

 he has had it from all the warmer countries, but not from 

 arctic and temperate climates. He has it even in the 

 w^armer portions of Europe, from Italy, Greece, Spain, 

 Portugal, Gibraltar, and Malta. He generalizes that it is 

 found north and south of the equator to 38° north and 

 south latitude. In the United States it is common in 

 most of our Southern States. I have seen specimens 

 from New Orleans, La. (Dr. H. A. Veazie and Dr. W. S. 

 Thayer), from Natchitoches, La. (Mr. C. W.Johnson), from 

 Napoleonville, La. (Dr. L. E. Flannagan), from eastern 

 Texas (Dr. A. E. Woldert), from Hot Springs, Ark. (Dr. 

 A. W. Wright), from Pelham, Ga. (Mr. D. W. Coquillett), 



