262 ENTOMOLOGICAL NEWS. [June, 'lO 



peated efforts to obtain eggs. There may be some peculiarity 

 in this respect connected with the chitinous hooks upon the 

 eighth abdominal segment of the female adult, although it is 

 probable that the eggs are laid in boat-shaped masses. 



It may be stated that Mansonia titillans occurs in the United 

 States. We have specimens taken by Dr. J. Hobart Egbert in 

 the Everglades of Florida. As Pistia, the plant upon which 

 the larvae occur, is widely 'distributed through the Southern 

 States, occurring as far northward as North Carolina, this 

 mosquito may be looked for in other favorable localities. 



Another statement regarding Mansonia which has passed 

 unchallenged is that the receptacula seminis of the female are 

 but two in number. In fact, in all the species which typically 

 pertain to this genus there are three receptacula. The state- 

 ment is due to Neveu-Lemaire, who found two receptacula 

 in an oriental species, Mansonia unifornris Theob.* It is prob- 

 able that all the Old World species placed in Mansonia have 

 but two receptacula seminis. Besides Mansonia uniformis, 

 we have examined M. annulifera Theob. and find it has but 

 two receptacula. We are at present unable to point out any 

 tangible generic character, except the number of receptacula, 

 to differentiate these forms. The eighth abdominal segment 

 of the female shows the same series of hooks mentioned above 

 as present in M. titillans, though it seems strange that the 

 two groups should be congeneric with a different number of 

 receptacula. It appears that the males of all the oriental Man- 

 sonia are unknown and the same is true of the larvae. The 

 eggs of one of the forms have been figured by Theobald from 

 a photograph furnished him by Dr. Daniels. f They show a 

 long slender neck at one end and are stated by Theobald to be 

 laid singly. This last statement, however, we are inclined to 

 doubt, both from the appearance of the eggs and of the female 

 abdomen ; at all events the eggs have not been obtained under 

 natural conditions. We refrain at present from designating 

 a generic name for these forms. Probably one of the numer- 



* Bull. Soc. Ent. France, xxii., 172, 1902. 

 f Mon. Culic., i., 21, TQOI. 



