228 THE CANADIAN ENTOMOLOGIST. 



SEXES OF HOMOPTERA LUNATA. 



BY THOS. E. BEAN, GALENA, ILLINOIS. 



For the purpose of further testing conclusions stated on p. 174 regard- 

 ing Homopteras lunata, edusa and Saundersii, I have secured all observed 

 at my sugar since the former writing. 



There are 38 '■'■ lunata" 23 ^'■Saundersii" and 18 ^'- edusa." Having 

 opportunity to examine these while fresh, I observed the anatomy of the 

 sex organs in each specimen as captured. The result verified the view 

 previously advanced — the lunatce were all females, the Saundersii and 

 edusce all males. 



In regard to the wing-markings, the comment already printed applies 

 equally to this lot of specimens ; in addition I may say that there appears 

 to be somewhat greater variation of t. p. line among the females (lunatce) 

 than in the two series of males (edusce and Saimdersii ). 



A large proportion of these specimens — nearly one-half — were taken 

 in September ; of those obtained in previous years a majority were cap- 

 tured earlier in the season. 



It will be noticed the numerical proportion between the sexes, and 

 also between the two male forms '■^Saundersii" and "■edusa" already 

 printed, is pretty well sustained in the present lot. The proportion of 

 about 4 " Saundenii" to 3 " edusa; " is perhaps a tolerable approximation 

 to their relative abundance here, as it was during the past summer my aim 

 to secure all observed. 



A note from Mr. Grote advised examination of the frenulum. I have 

 applied this test to each of the 162 specimens, with result confirming the 

 conclusion already reached. This structure is uniformly simple in 

 " edusa " and " Saundersii" and compound in " lutiata." 



Naturalists' Directory. — A new edition of this convenient publi- 

 cation is promised about May next. Besides containing as complete a 

 list of the names of Naturalists as it is possible to obtain, it is to embrace 

 a list of all the scientific societies in North America, their location, officers 

 and active members. Any communications relating to this Directory 

 should be addressed to S. E. Cassino, Salem, Mass. 



