THE CANADIAN ENTOMOLOGIST. 391 



Explanation of Plate. 

 Fig. I, 2. Aeshna juncea L, $, abdominal segments 1-4. r, lateral; 

 2, dorsal view. 

 D, dorsal spot of segment i. 

 L, lateral " 

 AL, anterior lateral spot. 

 ML, middle 

 PL, posterior " '< 



AML, the homologue of x\L+ ML on seg. 2. 

 AD, anterior dorsal spot. 

 MD, middle " '' 

 PD, posterior '• " 



" 3. Aeshna inierrupta Walk. ^ , anterior hamules. 



HF, hamular fold; HP, hamular process; Sp., spine of the anterior 

 lamina. 

 .. Aeshna juiicea L, ^ . Letters as in Fig. 3. 



. Aeshna juncea L. $ , ventral aspect of abdominal segments 9 and 

 10; Ov, ovipositor; BO, basal plate of ovipositor; GV, 

 genital valve ; VP, valvular process ; Ap., appendage. 

 (To be continued.) 





NOTES ON SOME SOCIETY ISLAND MOSQUITOES. 



BY R. W. DOANE, STANFORD UNIVERSITY, CALIF. 



During a short stay in July and August on Tahiti, Morea and 

 Tetioroa I found the mosquitoes very troublesome, particularly so in the 

 dense growth where one could not get the sea breeze. I had not time to 

 make any particular study of the species occurring there, but the following 

 notes on the three species that I met with may be acceptable to those 

 interested in the group. 



Stegomyia calopus, Meig., and .S*. sciitellaris. Walk, are the two 

 common day mosquitoes, occuring in the houses and out of doors every- 

 where. They breed together in standing, sometimes rather foul, water. I 

 have seen the larvae by the millions in the small drainage gutters along 

 the streets of Papetee. No effort is made to control them, although one 

 man told me that at some seasons the mosquitoes were so bad in places 

 that people took refuge in their beds to escape the pests. All the beds 

 are provided with a canopy of mosquito netting, but there are no screens 

 on the doors or windows. 



With the opening of the Panama Canal and the consequent short and 

 frequent passage of ships from that region to all of these Pacific islands, 



November, 1908 



