June, 1917.] Proceedings of the Society. 143 



being in fact found southwest of Tucson, only where lack of trails make them 

 difficult to reach, so a return to the Santa Catalina range was made for 

 further collecting in Sycamore canon and on Mt. Bigelow. Immense congre- 

 gations of Hippodamia were observed at the extreme top of this mountain, 

 the beetles in masses five or six inches deep. Mr. Rehn having already 

 started alone, the return journey was made by Dr. Lutz via San Francisco 

 and Utah. The cost of the entire trip was somewhat less than $ 1,000 and 

 the results, as shown by the boxes of insects of all orders diplayed, quite 

 extraordinary in respect of the additions to our list of insects previously 

 known, if at all, from Mexico. In Longhorn beetles the result seemed largely 

 due to the persistent collecting at light ; in Cicindelidse it appeared in speci- 

 mens of C. calomicra Bates ; in Elateridas in Pyrophorus arizonicus of which 

 a description by J. A. Hyslop will shortly appear, while such rare species as 

 Laccophilns lateralis, Chrysomela rubiginosa and Telegeusis dehilis, identified 

 by Mr. Mutchler, added to the interesting character of the beetles generally. 



In the discussion that followed Mr. Wright spoke of the number of Mexican 

 forms found by Mr. Watson among the butterflies Dr. Lutz had collected, 

 and by himself among the moths, while Dr. Forbes and Mr. Davis brought 

 out by their questions that the success was not due to an unusually wet 

 season, it having been normal in that respect. The desert, Dr. Lutz said, was 

 caused by an almost total absence of rain at the critical season, but rain 

 could always be expected in July and August. 



Dr. Bequaert exhibited with the lantern a large number of colored views 

 of African collecting scenes, mentioning especially the fuel stations on the 

 Congo River where the boats stop for wood, great numbers of wood boring 

 beetles occurring there in the old logs and branches that accumulate, the 

 clearings in the rain forest, and about pools and brooks, also the savannah 

 country and grass plains of the interior. Pictures were shown of great 

 termite nests and of the Queen cell, of the fungus gardens, army ants, ant- 

 inhabited acacia thorns, weaver ants, Trigona bees in bamboo nests, and 

 grasshoppers, the whole giving an extraordinary impression of Dr. Bequaert's 

 familiarity with African collecting. Among the pictures an interesting series 

 showed African dwellings in a descending scale of grandeur from the 

 Europeam frame houses at Boma to simple structures built entirely of leaves 

 in the interior in front of one of which stood Herbert Lang and James 

 Chapin. 



Mr. Olsen and Dr. Forbes discussed the matter of the weaver ants and 

 those inhabiting acacia thorns giving somewhat analogous instances. 



Mr. Davis exhibited Ca'noiiiyia ferruginea and gave some data that will 

 appear in Miscellaneous Notes. 



Mr. J. W. Angell exhibited Plusiotis adaleide from Mexico, also a Sino- 

 dendron labelled " Tex " and a Pseudohtcanus mazaina with but one mandible. 



Mr. Leng called attention to an article on " Collecting Lady Birds by the 

 Ton " by E. K. Carnes. 



Mr. Wright recalled his experience in finding the grass for many acres 



