349 



The two social beetles are the Cucujids, Coccidotrophus socialis, 

 Schwarz & Barber, and Eunausibius wheeleri, Schwarz & Barber. These 

 feed both on the nutritive parenchyma in the leaf petiole and on the 

 saccharine excrement of the Coccids. A brief description of all stages 

 of C. socialis is given together with its life-history and habits. 

 Notes are given on the enemies of the beetles and the Coccids that 

 they cultivate and the decay of colonies. Their eventual extinction 

 is due to ants, especially Solenopsis altinodis, Forel, that destroy the 

 beetles and to predators and parasites that destroy the Coccids. In 

 a few beetle colonies a number of larvae of a predatory Coccinellid, 

 Scymnus xantholeucus, Schwarz & Barber, have been observed, and 

 abundant enemies of the Coccids are the Cecidomyiid. Diadiplosis 

 pseudococa, Felt, and the Encyrtid, Blepyrus tachigaliae, Brues. 

 E. wheeleri is briefly described ; it is rarer than C. socialis. 



The activities of these beetles are reviewed in the light of knowledge 

 concerning other members of the family to which they belong, and 

 the social life among the Coleoptera and the development of the feeding 

 habits and behaviour of social Cucujids are discussed. 



This interesting paper cannot be properly dealt with in a summary 

 and should be read in the original. 



Wheeler (W. M.). Notes on the Habits of European and North 

 American Cucujidae (sens, auct.).— Zoo/o^zca, New York iii 

 no. 5, 24th December 1921, pp. 173-183. [Received 1st May 

 1922.] 



Notes are given on the habits of European and North American 

 Cucujidae, including Silvanus {Oryzaephiliis) surinamensis, L., S. 

 (0.) mercator, Fauvel, S. (0.) bicornis, Erich., 5. (0.) gossypii, Chitt.,' 

 5. gemellatus, Duv., Cathartus advena, Waltl, C. cassiae, Reiche,' 

 Laemophloeus femigineus, Steph., and Catogemis rufits, F.' 



Felt (E. P.). A new Diadiplosis. — Zoologica, New York, iii no 8 

 24th December 1921, pp. 225-226. [Received 1st May 1922.] 



All stages of Diadiplosis pseiidococci, sp. n., are described from 

 British Guiana. The larvae were found devouring Pseudococcus 

 bromeliae, Bch., in a cavity of the peculiar mvrmecophilous tree, 

 Tachigalia. This midge closely resembles the West Indian D, cocci, 

 Felt, which was reared from larvae infesting eggs of Saissetia nigra, 

 Nietn., a scale-insect frequently abundant on the stems of Sea Island 

 cotton. 



Brues (C. T.). A new Blepyrus. — Zoologica, New York, iii no 9 

 24th December 1922, pp. 229-230. [Received 1st' May 1922.] 



Blepyrus tachigaliae, sp. n., was bred from Pseudococcus bromeliae, 

 Bch., occurring in cavities in the petioles of Tachigalia sp. in British 

 Guiana. 



Merrill (G. B.). Lady Beetles of Florida.— (?/r/y. Bidl. State Plant 

 Bd. Florida, Gainesville, vi, no. 2, January 1922, pp 33-46 

 15 figs. [Received 2nd May 1922.] 



The species of CoccineUids listed as occurring in Florida number 

 71 ; the more common of these are dealt with, and their 

 beneficial habits explained. There are two species, however, that are 



