234 3I0S QUI TOES 



It will be noticed in the tables wLich follow, and in the 

 consideration of mosquitoes and j^ellow fever in Chapter 

 V. that Mr. Coquillett and the writer have adopted the 

 generic name Stegomyia for the mosquito which has in 

 our previous writings been named Culex fasciahis. I have 

 been induced to adopt this name through correspondence 

 with Mr. Theobald, who writes me that he has discovered 

 characters which separate this mosquito from the old 

 genus Culex, and that he has proposed the name Stego- 

 myia for the genus. He has given me no clew as to the 

 characters upon which he has founded this genus, except 

 that thej- are *' scale characters." A study of the scale 

 structure of this insect and other mosquitoes of the genus 

 Culex does not reveal any very important differences, but 

 Mr. Coquillett, from other characters, has concluded to 

 adopt Mr. Theobald's generic name, and it is here used 

 with the characters pointed out in the table. It will be 

 unfortunate should this use of the name antedate the 

 publication of Mr. Theobald's monograph, since the genus 

 should be his and not ours. Two other new generic names 

 proposed b}^ Mr. Theobald, viz.: Toxorhynchites and Con- 

 chy Hastes, have been adopted and are characterized in the 

 tables. It will be noticed that the characterizations are 

 printed with quotation marks, and that they are followed 

 by Mr. Theobald's name in parenthesis. This method of 

 printing will make Mr. Theobald responsible for these 

 genera as well as for Stegomyia, in the event that this 

 book is issued from the press in advance of his publica- 

 tion. 



With these words of explanation, the folloAving tables, 



