1919] ECONOMIC ZOOLOiiY — ENTOMOLOGY. 861 



It was found that this borer attacks only Living red mangrove and casuarlna, 

 the trees attacked ranging from 2 to 6 in. In diameter; those over five yean 

 old usually are not attacked, except high In the tope or branches. Small 

 casuarina trees are attacked near the base as a rule; In case <>f small trees 

 the trunk may be girdled before the larva- attain their growth, and In most 

 cases the damage is done before the presence of the insert is noticed. Many 

 red mangrove trees in the swamp along Uiscayue Bay were found in L916 to 

 have been killed by the borer. 



But one year is required for the development of this borer from egg to 

 adult. In addition to several predatory enemies, mention is made of two 

 hymenopterous parasites, namely, Atanycolus rugosiventris which was found 

 to be fairly common at Miami Beach in 1917 and 1918, and .1. UiUvna n. sp. 



Investigations have shown that many trees can be sa\i.| by a method 

 described by the author, which consists of cutting and burning all badly dam 

 aged casuarina trees between September and March to kill the Insects before 

 they emerge. The trees may be entirely removed, cut off near the ground, or 

 merely topped so that they will sprout from the stump and make new growth. 

 Since the borer usually attacks the young tree near the base, care should ln- 

 exercised that no infested stumps remain. Trees only slightly damaged and 

 showing evidence in the rapidly healing wounds of recovery should not be cut, 

 since the wounds will soon heal. Casuarina trees between !.•"> and G in. in 

 diameter growing in proximity to mangrove swamps or near other infested 

 casuarina trees should be examined carefully in September and March and 

 the young larva? killed by spraying the affected part of the trunks with poi- 

 soned kerosene emulsion, made in accordance with the following formula de- 

 vised by Craighead (E. S. R., 34, p. 652) : Standard mlscible oil 1 pint, water 



5 gal., and sodium arsenate 1 lb. From April to June, when large numbers of 

 the adult beetles are flying and feeding on the bark, they should be killed by 

 spraying the tree trunks with the poisoned kerosene emulsion. No pruning of 

 casuarina trees should be attempted between April and August, since the con- 

 sequent flow of sap will attract the flying beetles to the trees 



The poplar borer (Saperda calcarata), R. N. Chkystal (Aft. 000. Comada, 



6 (1910), No. 4, pp. 333-337, figs. 4).— This is a report of studies of fif, mUnratn 

 in southern Alberta, whore it is a source of serious damage to cottonwoods. 



An annotated list of the Cerambycidae of California. U. T. Caknktt 

 (Canad. Ent., 50 (1018), Nos. 5, pp. 172-/77; 6, pp. 906 21.1: 7, pp. . : 8, 



pp. 281-284).— In these parts 226 species are listed. 



Conserving corn from weevils in the Gulf Coast States. E. A. Back (I 

 Dept. Agr., Farmers' Bui. 1020 (1010), pp. 36, figs. 2/).— Tins is a summary of 

 information on two insects that do more injury to COED in storage than all 

 others combined, namely the rice weevil or so-called "black weevil" and the 

 Angoumois grain moth or so-called "fly weevil," including their life history 

 and habits, injury caused, and means of control. Detailed instructions arc 

 given for the prevention of injury through proper fumigation in air-tight bins. 

 etc., emphasis being placed upon the financial gain resulting. As Illustrative 

 of this saving and the manner in which it may be accomplished, descriptions 

 are given of the way in which three farmers saved their corn from l< SB. 



Pea and bean weevils, S. II. Skaife [Union So. Africa, I>ci>t. Agr. BuL 12 

 (101S), pp. 32, figs. 17).— This is a discussion of the ttve ■pedes of wee 

 belonging to the family Bruchida? known to infest peas and beans in South 

 . Africa, all of which have been introduced from overseas. 



Studies in Rhynchophora.— VI, "The New York weevil." I>. 9HABF (lour. 

 N. Y. Ent. Soc, 26 (1918), No. 8-4, pp. 215-21$, pi. /).— Thifl relates to morpho- 

 logical studies of Ithycerus noveboracensis. 



