OF WASHINGTON, VOLUME XII, I'.UO. 13 



The next paper, entitled "Notes on the Mosquitoes of Ar- 

 kansas," by J. K. Thibault, Jr., was read by Dr. Dyar and 

 discussed by Messrs. Dyar, Banks, Piper, and Schwarz. 



NOTES ON THE MOSQUITOES OF ARKANSAS. 



[Diptera, Culicida-.] 

 BY JAMKS K. THIBAULT, JR., Scott^ Arkansas. 



The following notes are the result of observations made at 

 spare moments of time during the past four seasons. As noth- 

 ing has been published upon the mosquitoes of this region, it 

 is hoped that they may possess some value, although neces- 

 sarily very incomplete. The determinations have been revised 

 by Dr. Dyar and Mr. Knab, of the U. S. National Museum. 



MITES ON MOSOUITOKS. 



More or less every adult specimen of certain species is found 

 to be infested by a red mite very similar in general appearance 

 to those occasionally found on house flies, though for the 

 most part such will be the case only early in the season spring. 

 The proportion of infested individuals among the various 

 species is very striking, Anopheles and Mausonia showing the 

 greatest number of infested individuals, likewise the greatest 

 number of mites per mosquito. The first Anop/iclc* and 

 Maufouia to hatch out show over 95 per cent of infested 

 specimens, and indeed it is well-nigh impossible to find a sin- 

 gle specimen that is not parasitized. (^ilr.\- aboiniiiator D. 

 & K., probably comes next, but in this case the mite is blue- 

 ish green about the same shade as that seen in ("ulcx aboni- 

 iuaior itself when first hatched. This probably accounts for 

 the blue-green color of the otherwise red mite. 



\ list the various species which I have found to be infested, 

 placing those showing the greatest percentage of infested in- 

 dividuals first in the list and so on in order: 



AnopJieles crucians Wied. 

 Anopheles quadrimaculatus Say. 

 Anopheles punctipennis Say . 

 Mansonia perturbans Walk. 

 Culex abominator D. & K. 

 Citlex territans Walk, (rarely). 

 Acdes triseriatus Say (only once). 

 Megarhinns xeptentrionalis I). & K. > . r.uvh > 



Nearly all of the above-named species hibernate as adults, 

 and one might be led to believe that there was some connection 

 between this and the fact that they are so often parasitized, but 



