64 INSECUTOR INSCITI^ MENSTRUUS 



from midwinter until late spring, but this could hardly be 

 classed as a permanent body of water. Quite a variety of 

 larvae are to be found there at different seasons. After the 

 heavy rains of July, 1916, the hole held about -i feet of very 

 muddy water. In looking for larvae the writer was able to see 

 only the tips of the breathing tubes of most species present. A 

 striking contrast was presented by the larvae of Aedes bimacii- 

 latus. These individuals lay almost parallel to the surface of 

 the water and their dark brown bodies were easily picked out 

 against the light yellow of the muddy water. So far as the 

 writer knows, this position at the surface has heretofore been 

 mentioned as a characteristic only of Anopheles and Urano- 

 tcenia. The larvae were present in fairly large numbers. Bred 

 specimens were sent to the late Mr. Knab, of the Bureau of 

 Entomology, for determination. Mr. Knab called attention to 

 another fact of interest, namely, that this is a new northern 

 locality record of this species. Specimens have been taken 

 heretofore in Texas, Louisiana. Mississippi, and Arkansas. 



Dafe of publication. March 18, 1919. 



