254 EXPERIMENT STATION EECOED. [Tol. 3T\ 



elusions have not been known previously. The polyhedra are nucleoprotein 

 crystal-like degeneration products and not organisms. The polyhedra contaia 

 Iron and phosphorus. On dissolving polyhedra in alkali and after dialyzing 

 away the alkali and evaporating the protein solution crystals are obtained 

 which simulate the original polyhedra." 



A bibliography of 23 titles is included. 



Some facts relative to the influence of atmospheric humidity on insect 

 metabolism, T. J. Headlee {Jour. Econ. Ent., 10 (1017), No. 1, pp. Sl-38).— 

 The author's studies indicate that the speed of metabolism in the pupje of both 

 the bean weevil and the Angoumois grain moth varies inversely with the atmos- 

 pheric humidity. In the adult of the former it varies with, while in the adult 

 of the latter it varies inversely with, the humidity. In the egg stage the speed 

 of metabolism varies inversely with the humidity, but in the larvte and in the 

 life cycle as a whole it varies with the humidity. It was found that rcproiluc- 

 tion of the bean weevil in tightly closed jars can be prevented by the introduc- 

 tion of sufficient concentrated sulphuric acid to keep the atmospheric humidity 

 low. 



Methods used in determining wind dispersion of the gipsy moth and 

 some other insects, C. W. Collins {Jour. Econ. Ent., 10 {1917), No. 1, pp. 170- 

 177, pis. 2).— "Additional data [E. S. R., 33, p. 653] have been collected on long- 

 distance wind dispersion of gipsy moth larvae ; namely, across Cape Cod Bay 

 off the coast of Massachusetts. The direction of the wind, recorded at the time 

 taken and previously, indicated the source of infestation to be from 19 to 30 

 miles distant on the mainland. Fretiuent examinations of the screens and close 

 data kept on movements and direction of the winds were necessary to make 

 these records of value. 



" Screens used in the cranberry bog experiments and placed horizontally over 

 the vines were well adapted to catch the drop of small larvje floating over such 

 areas, while the upright wire and cloth screens proved better for securing long 

 distance spread. 



" The recording of three extra lepidopterous species and possibly a fourth 

 being carried by the wind In the larval stage suggests some possibilities for 

 investigation with others along this line." 



A method for the study of underground insects, J. W. McColloch {Jour. 

 Econ. Ent., 10 {1017), A'o. /, pp. 1S3-1SS, f\g. i).— The author has found that 

 the use of a 6-foot excavation in the ground, the sides of which are boarded up 

 or cemented and a roof added, permits the rearing of subterranean insects at a 

 fairly constant temperature. The fact that the daily range of temperature is 

 small makes It po.sslble to hold it at any desired degree for some time. The 

 conditions in the cave have appeared to approximate those that would be en- 

 countered in the field by the subterranean forms studied. 



Sixteenth report of the State entomologist of Connecticut for the year 

 1916, W. E. Britton {Connecticut State Sta. Rpt. 1916, pt. 2, pp. VII+65-146, 

 pis. 16, figs. S). — Following a report of nursery and apiary inspection, work 

 with the gipsy and brown-tail moths is discussed. An account is next given 

 of the turnip aphis {Apliis p,9rudol)rnssic(r) which was widely destructive during 

 the year in Connecticut. Brief reference is made to the control of aphids In 

 fields of seed beets in which it is stated that blackleaf 40 proved a satisfactory 

 remedy. General accounts are given of the white-marked tussock moth and the 

 rose chafer. 



Experiments in controlling the striped cucumber beetle and the squasli borer 

 are briefly described by W. E. Britton and Q. S. Lowry (pp. 116-118). The 

 striped beetle was more abundant than has ever been observed elsewhere and 



