ECONOMIC ZOOLOGY — ENTOMOLOGY. 651 



arated the following fun.^i ri'oni tlio diseased material: ('(miothjiriiiin hrfiiJir ii. 

 «!)., Fiislcoccinii hctiiliiniin n. sp., Sixtrodcsniiidii citrcniitnun ii. sji.. and I'rsln- 

 lozzi haitif/ii Ix tuUi n. var. 'l\'rbiiicai descriptions are .uiveii of tJie ditl'ereiit 

 fungi. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



General biology, O. llKHTWiii ( MJaonehic liiolou'iv. ./iiia: (liifttdv FifscJicr, 

 ]!)()(;. i)]i. W I -'^i))!!. I'nix. .ill). — Tills volume is a second and revised edition, 

 with a cliaiiKe of title of tlie anthor's work on the cell and the tissues. The first 

 edition, under the latter title, was publislied in two parts, wliil(> all the ma- 

 terial is liroufiht tofjcether in one volume in the new edition. The subject- 

 matter has been extensively revised and brought U]) to date. 



Rabbit destruction (.lour. Dcpt. Af/r. Wefit. Aiist., I'f {IMG), No. J,, pp. 281- 

 2K'i). — The value of rabbits for food is briefl.v discussed and notes are given 

 on the great destruction caused by rabbits where the.v multi])ly too rapidly. It 

 is proposed to introduce a carnivorous red ant from South Africa which is said 

 to attack rabbits, particularly the young, and kill them within I'-t hours after 

 birth. .\n examination of the feeding habits of these ants is being made to 

 determine whether it would be safe to introduce tjiem. 



The serpents of Pennsylvania, II. A. Puuface (Pcini. Dcpt. Af/r. Jio. Bid. 

 Div. Zoo}.. -'/ (1906). No. ',-■',. pp. n.')-.i<l8. pis. Jf2, figs. 23).— The snakes known 

 to occur in Penns^-lvania are described and notes are given on their distribution, 

 relative abundance, and feeding habits. 



The destruction of injurious niollusks, (i. Ganuara [Com. Par. Apr. [Me.T- 

 /co], Circ. 'i.i. PI). J'), fii/x. (!). — In combating injurious slugs and snails, the 

 author recommends collection by hand iind the use of various si)raying devices 

 distiMhuting irritating and I'oisonons substances. 



Variation in partheno genetic insects, V. L. Kellogg (^Science, n. ser., 2.J 

 {I'.Uiii), \(i. H22. pp. i;<).')-i;ii!i ). — It is commonly accejited at least by one school 

 of biologists that variation in living organisms is partly the result of the mixing 

 of the different tendencies from the 2 i)arents. According to this theoi-y organ- 

 isms produced parthenogenetically should show less variation. A study of this 

 matter in bees and i)]ant lice showed the op])osite condition to be true. Drones, 

 which arc l<no\vn to he ]i:iiilieiiogenetic in origin, showed a greater variation 

 than worker hees. In a lew instances ])arthenogenetic eggs were obtained from 

 worker bees and the drones in-oduced from the.se eggs showed a great amount of 

 variation. Simil.-irly the variation observed in plant lice produced partheno- 

 genetically showed ;is great a range as in the case of mos(iuitoes :ind other 

 insects in which amphimixis ta!<es ])l;ice. 



Zoological studies in the sand regions of the Illinois and Mississippi 

 River valleys, (". A. IIaht (null. III. state L(il>. Xaf. Hist.. 7 (V.iUl). Art. 7. pt. 

 3, pp. 19.5-212. pis. .7). — In the investigations u])on which this article is based. 

 particular attention was given to the geographical distribution of important 

 ppecies of insects in the sand-hill regions of the Illinois and Mississippi IJiver 

 valleys. Observations were made on Orthoptera', Ilemiptera. ('oleoi)tera, Xeu- 

 roiitera. Lepidoptera, and other orders of insects as well .-is upon batrachians 

 and reptiles. A brief bibliography of the subject is given. 



Report of the economic zoologist, II. A. Surface (A)I)i. Rpt. Pom. Dcpt. Af/r.. 

 11 ( liu).', I. pp. 129-1 'I'l ). — The woi-k of the year has consisted in the examination 

 of specimens sent in for determination, the investigation of various out!)reaks 

 of injurious insects, giving lectur<>s in various parts of the State, the inspection 

 of nurseries and orchards, and making collections of insects. Lists ui-e given of 

 the licensed nurserymen and tree dealers in l*ennsylv;inia. 



