505 



If the bugs have already entered a maize field, the infested portion 

 should be enclosed by a barrier, and the insects sprayed wdth kerosene 

 emulsion diluted with 8-10 parts of water, or nicotine sulphate diluted 

 with 500 parts of water and 4 lb. of soap added to each 100 U.S. gals, 

 of the spray. Pure kerosene kills the maize, but is very efficient, 

 and may be useful if a large number of bugs are concentrated in a 

 small area. 



Wlien chinch bugs are very abundant, it may be advisable to give 

 up wheat for a year or two and sow immune crops such as soybeans, 

 potatoes, vegetables, etc. 



Davis (J. J.). New Species and Varieties of Phyllophaga. — Bull. 

 Illinois Nat. Hist. Survey, Urbana, xiii, article] xii, August 1920, 

 pp. 329-338, 6 plates, 8 figs. 



From collections of May-beetles from various parts of the United 

 States the following new species and varieties are described : — Lach- 

 nosterna {Phyllophaga) perlonga, on pecan, elm, hicory, and honey 

 locust ; L. fraterna, Harr., var. mississippiensis, on pecan, poplar, 

 elm, hickory, black oak, plum, and apple ; L. pearliae, on honey 

 locust, elm, winged elm, buttonwood, willow, and walnut ; L. soror ; 

 L. foxii on blackberry {Rubus nigrobaccus), blueberry {Vaccinium 

 sp.), wild rose {Rosa sp.), persimmon {Diospyros virginiana), red oak 

 {Quercus rubra), Spanish oak {Quercus falcafa), locust {Robinia 

 hispida), elder bush, black gum, hackberry, birch, and sour gum ; 

 L. impar ; L. parvidens, Lee, var. hysteropyga ; and L. hirticula, 

 Knoch, var. comosa. 



Though he has not had an opportunity to study the actual types, 

 the author considers L. quadrata, Sm., to be identical with L. postrema, 

 Horn. The latter is knowTi only from the male, and the former from 

 the female. 



Brooks (F. E.). Round-headed Apple-Tree Borer: Its Life History 

 and Control. — U.S. Dept. Agric, Washifigton, B.C., Bull. 847, 

 9th August 1920, 42 pp., 9 plates, 5 figs. 



Saperda Candida, F. [R.A.E., A., iii, 586: \i, 447] is a serious pest 

 of apple, pear, and quince, and occurs in the United States and Canada 

 over most of the apple-growing regions east of the Eocky Mountains. 

 It also breeds in wild crab, hawthorn, mountain ash, and service tree. 

 Infestation is often confined to rather definite areas, and it^ not 

 uncommon spread to new ground is probably due to the presence of 

 an abundance of wild trees near the freshly planted orchard. 



Much of the hfe-history has already been noticed [loc. cit.], but it 

 varies with the locality. The larva may spend from one to four years 

 in the tree, this stage being of longer duration in the north than in 

 the south. The pupal stage approximately coincides with the blos- 

 soming time of apple, the beetles appearing in the south earher than 

 in the north. 



During o\iposition the females are capable of flying to a considerable 

 distance, but prefer to place their eggs in trees near the place where 

 they themselves have developed. By preventing the development 



