41 



(3) If wo can obtain milk witli a inoro homogeneous size of fat globules, the latter 

 will all rise in the same time ; tiie ripening of the cream before churning will be more 

 even, and the time required for tliis ripening more easily controlled. 



This experiment indicates rather tlian proves results ; but it is certainly safe to ad- 

 vise the farmer always to divide the milk at milking, especially since the only addi- 

 tional trouble required is the use of two sets of milk pails. And the results seem to 

 render the dairyman independent of some of the greatest diiliculties with which he 

 has to contend, especially in the making of butter. 



Studies on milk secretion. — This article exjjlains the way in which the 

 milk of the cow is secreted, and shows how this affects the practice of 

 milking. It is illustrated bj' diagrams of a section of an udder and a 

 cross-section of milk vesicles. 



BULLETIN NO. 25, JUNE, 1889. 



Introduction by the Director (pp. 3, 4). 



The connection of the Station Entomologist with the Station stafiF, and the result- 

 ing conditions under which this bulletin is issued, are of such a nature that a few 

 words of explanation seem desirable. 



Professor Webster is the official field agent of the Entomological Division of the 

 United .States Department of Agriculture. By a special arrangement with the De- 

 partment, however, he is stationed at La Fayette, and the Station is so fortunate aa 

 ^o avail itselfof his services as a regular member of its staff. TheDepartmentof Agri- 

 culture, however, reserves the first right of using the results of any investigations made 

 by him ; hence the material here collected as a Station bulletin has all previously ap- 

 peared in official publications of the Department, either in the Annual Report of the 

 Commissioner for 1888, just issued, or in the monthly journal issued by the Entomo- 

 logical Division, known as " Insect Life." Neither of these publications, however, 

 ever reaches more than a small fraction of the farmers of our State, so it is confidently 

 believed that the facts here presented will be received by the vast n^ajority of recip- 

 ients as wholly new. 



Entomological experiments, F. M. Webster (pp. 5-18). 



Experiments in rearing the plum curculio (Contrachelus nenuphar) from 

 plums and other fruits. — See lleportof the United States Department of 

 Agriculture for 1888, pp. 78, 79. 



Notes upon the longevity of the early stages of Eburia quadrigeminata, 

 Say.— See Insect Life, Vol. I, p. 339. 



A beetle {Tenebrionides mauritanica) living inan insecticide. — See Insect 

 Life, Vol. I, pp. 314 and 360. 



The larva of the clover-stem borer {Languria mozardi, Latr.) as a gall- 

 maker. — See Insect Life, Vol. I, p. 119. 



Notes on Pteromalus puparum. — See Insect Life, Vol. I, p. 225. 



Little-known enemies of the potato plant in New York {Cosmopepla carni- 

 fex and Crepidodera cucumeris). — See Insect Life, Vol. I, pp. 157, 158. 



Notes on species of Br yob ia infesting dwellings. — See Insect Life, Vol.1, 

 pp. 277-279. 



The grain aphis {Siphonbphora arena'). — A brief account of this insect, 

 which has recently become very abundant in Indiana. 



