12 ENTOMOLOGICAL NEWS. [January, 



fact that, according to Mr. Slingerland, the egg is quite hard and may be 

 roughly handled without injuring it. I have found the kerosene emulsion 

 entirely ineffective on the hard eggs of Melittia ceto and Anasa tristis, 

 but quite completely effective on the soft eggs of certain Tortricid moths 

 and of certain Coccidae. Chitine of any thickness resists perfectly the 

 action of most penetrants, including alcohol and chloroform, yields but 

 slowly to potash, carbolic acid or acetic acid, but is readily attacked by a 

 saturated solution of bichloride of lime, or by eau Javalle and eau La- 

 barraque. In such strength as we may apply them on vegetation, I be- 

 lieve that none of the materials named will injure a hard shelled egg, 

 simply because they could not penetrate it. This will e.xplain, also, why, 

 on certain bugs like Anasa tristis or beetles like Macrodactylus subspino- 

 sus, the diluted kerosene is ineffective, and even the pure article is resisted 

 ■quite strongly. On such insects the spiracles offer the only part of entry' 

 for the insecticide, and these are exceedingly well protected in the cases 

 mentioned. The softer the egg or the insect, and the less protected the 

 spiracles the more effective becomes the kerosene emulsion. 



Notes and. New^s. 



ENTOMOLOGICAL GLEANINGS FROM ALL QUARTERS 



OF THE GLOBE. 



[The Conductors of Entomological News solicit, and will thankfully receive items 

 of news, likely to interest its readers, from any source. The author's name will be given 

 in each case for the information of cataloguers and bibliographers.] 



To Contributors.— All contributions will be considered and passed upon at our 

 earliest convenience, atid as far as may be, will be published according to date of recep- 

 tion. Entomological News has reached a circulation, both in numbers and circumfer- 

 ence, as to make it necessary to put " copy" into the hands of the printer, for each number, 

 three weeks before date of issue. This should be remembered in sending special or im- 

 portant matter for certain issue. Owing to low subscription rate, " extras" will be charged 

 for, and when they are wanted, it should be so stated on the MS. along with the number 

 •desired. The receipt of all papers will be acknowledged. — Ed. 



In recent years the bark-beetle, Dendroctonus frontalis Zimm. has ap- 

 peared in the West Virginian forests with very disastrous results. To 

 combat it in some measure, Mr. Andrew D. Hopkins, entomologist of 

 the Agricultural Experiment Station at Morgantown, W. Va., has formed 

 the plan of introducing against it a new enemy in the European bark- 

 beetle, Clerus fortnicarius L. For this purpose Mr. Hopkins has lately 

 been in Germany, and has here applied himself with great skill and good 

 fortune to the collection of this useful insect, and to the study of its con- 

 ditions of life. He has taken to America the larvae of the bark-beetle 

 destroyer in various stages, as well as the pupa and imago, all in their 

 Winter rest, and the hope is entertained that if they arrive there in healthy 

 condition, the attempt at acclimation can begin next Spring. — Camillo 

 F. SCHAUFUSS, Mus. Dir. Meissen, Saxony. 



