766 EXPERIMENT STATION RECORD. [Vol. 87 



previously noted (E. S. R., 26, p. 147) deals with the Hymenoptera, and gives 

 tables for the separation of the families, genera, and species of forms known 

 to occur in (Connecticut, together with brief descriptions and records of the 

 distribution of such forms in the State. In collalMiration with the author. A. D. 

 McGillivray has prepared the part relating to the superfamily Tenthredinoidea ; 

 W. M. Wheeler that relating to the superfamily Formicoidea ; C. T. Brues, the 

 superfamily Serphoidea or Proctotryi>oidea. and families CJosilidje and Bethy- 

 lidae of the superfamily Vespoidea ; and S. A. Rohwer, the superfamilies 

 Sphecoidea and Vespoidea, with the exception of certain groups. The work 

 records 86 families represented by 034 genera and 1.102 species from Connec- 

 ticut, of which 366 species were originally de-scribed from the State. Com- 

 plete indexes to the plant hosts, insect hosts, and Hymenoptera are included. 



Observations on the occurrence of the Argentine ant (Iridomyrmex 

 humilis) in Silesia. -F. Pax (Illus. Schles. Monatschr. Obst, GetnuKe u. Gartcn- 

 bau, 4 (.1915), yo. S, p. SS ; abs. in Ret: Appl. Ent., Ser. A, 5 [1917), No. S, pp. 

 97, 98). — The Argentine ant, which is known to occur in the open in Portugal. 

 Bosnia, and Belgium, is reported to have been found in the greenhouse of the 

 Botanic Gardens at Breslau. 



On some North American species of Microdon, F. Knab {Proc. Biol. Soc. 

 Wa^h.. SO (1917), pp. ISfi-Hi). — Five new syrphld si">ecles are here described. 



New chalcid flies from Maryland. II, A. A. Girault {Ent. News, i8 (1917). 

 N9. 6. pp. 255-2.')8). — In continiKition of the papt>r previously noted (E. S. R.. 

 36. p. 5f>0) four species and one genus, Blattotetrastichua. are described as new. 



A new aphis-feeding Aphelinus, L. O. Howard {Pror. Biol. Soc. Wa^h., SO 

 (1917), pp. 77, 78). — Aphelinus lapxKligni reared from Aphis bakeri at Forest 

 Grove, Oreg., Is here described as new. 



The cyclamen mite, W. A. Ross (Agr. Ouz. Canada. 4 (1917), No. S, pp. 174. 

 175, fig. 1). — An unde.«:cribod species of Tarsonemus wa-s reporte<l by florists In 

 Hamilton. Brantford, and Nia;:ara Falls In the fall of 1916 as destroying the 

 flowers and flower buds of cyclamen and causing the foliage to curl, resulting in 

 the affected plants being rendered absolutely worthless. 



ANIMAL PRODUCTION. 



Physiological effect on growth and reproduction of rations balanced from 

 restricted sources, E. B. Hakt, E. V. McCollum, H. Steknk(k-k, and G. C. 

 HuMPHUFn- (['. S. Dcpt. Agr.. .Jour. Agr. Research. 10 (1917), No. -f. pp. 175- 

 198, pis. 15). — In this contribution from the Wiscon.sln Exp«'riment Station, work 

 previously noted (E. S. R.. 26. p. 407) is mntlnuo*!. 



The experiment was carried out with grade Ilolstein heifers weighing from 

 200 to 400 lbs. The feeding perio<1 began in 1910 anil continued for two years. 

 It was proposed that one group should receive its nutrients wholly from the 

 com plant, another from the wheat plant, a third from corn grain and wheat 

 straw, a fourth from wheat grain and corn stover, and a fifth from corn grain 

 and the roughage equally divided between alfalfa hay and wheat straw. In 

 carrying out the work other factors, as the baking of the wheat, the addition of 

 certain mineral elements, etc., were introduced in an attempt to obviate the 

 difficulties encountered. 



A physiologically complete ration »f corn-grain and corn-stover was not dis- 

 turbed by altering the calcium-magnesium ratio through the addition of mag- 

 nesium salts nor by the addition of mineral acids in excess. 



A ration from the wheat plant alone did not sustain growth and the animals 

 could not be bred. Blindness ensued, with feeble and emaciated condition and 

 excitability, followed by collapse. The addition of salt did not Improve the 



