1923] Proceedings of the Cambridge Entomological Club 
37 
Several members discussed the food-habits of Dragon-flies. 
Mr. Frost said that while collecting he had been protected from 
mosquitoes by Dragon-flies as long as he remained in sunshine, 
Mr. Dodge described the catching of Cicindela by Dragon-flies; 
he said the beetle could defend itself by standing on end and 
offering only its head and mandibles to attack. 
Mr. Roland Hussey gave an account of the hemipterous 
bugs of the genus Triatoma. See Psyche Vol. 29 No. 3. 
Mr. C. W. Johnson described a Tipula from Mt. Washington 
in which the venation of the wings differed on the two sides in 
ways previously considered characteristic of different species. 
The committee on public lectures reported that six lectures 
had been given as follows : 
February 18. L. O. Howard. On the work of the Bureau of 
Entomology with special reference to the Gipsy Moth and other 
injurious insects of local interest. February 25. Wm. T. M. 
Forbes. On the Butterflies and Moths. March 4. J. Chester 
Bradley. On Some Habits of Wasps and their relatives. March 
11. C. T. Brues. On Mosquitoes and other insects as carriers of 
disease. March 18. Miss Edith M. Patch. On the Seven Lives 
of an Elm Aphis, Erisoma lanigerum. March 25. J. H. Emerton. 
On the Spiders, their structure, habits and relations to Insects. 
The lectures were fully illustrated by lantern slides and by 
the new motion-pictures of insects of the Society for Visual 
Education. Audiences of about one hundred persons attended 
and paid half the expense of the course, the rest being met by 
subscription among members of the Club. 
May 9, 1922 Prof. W. M. Wheeler read a paper on the 
distribution of the genus Formica in the tropics. See Psyche 
Vol. 29 Nos. 4. 
Mr. C. W. Johnson described two new dipterous flies from 
Mt. Desert, Maine and other New England localities. 
Mr. R. H. Howe, Jr., remarked on recent collections of 
Dragon-flies, especially the formerly rare Williamsonia lintneri, 
several of which have lately been taken near Boston. 
