1916 ENTOMOLOGICAL SOCIETY. 61 



the case in this country. From the standpoint of economic status, two Otiorhyuchid 

 genera are at this time of special interest — Phyllohius and Polydrusus, which 

 comprise a number of species of weevils that range from various shades of brown 

 to bluish-green or golden yellow in colour. Several of these are listed as noxious 

 insects because of their habit of nibbling young opening buds and then later 

 attacking the foliage. With plants of horticultural importance as hosts some species 

 also do considerable harm by gnawing the parts of the blossoms and thus prevent- 

 ing fructification. According to Zimmerman* the species of these genera are 

 very similar in appearance and the two groups are distinguished by the character 

 of the antennal groove. In his discussion he, however, treats the different species 

 as a whole, considering in the following order Phyllohius argentatus L., Phyl. 

 maculicornis, Polydrusus sericeus Schall, Phyl. pyri, L., Poly, mollis Stroem., 

 Phyl. ohlongus L., and Phyl. viridicollis Fabr. Aside from merely mentioning 

 the names of the foregoing species and calling attention to errors in the writings of 

 other authors, very little information is given as to the life histories and bionomics 

 of the insects. It is to be noted also that impressifrons is not listed, an omission 

 which would indicate that it was not of sufiBcient importance to be considered 

 in an economic treatise. Judeich* and Nitsche mention nine species of the genus 

 Phyllohius and two species of the genus Polydrusus, and make no reference to 

 impressifrons. The also call attention to the lack of knowledge upon the dif- 

 ferent insects of the two groups. Die^ Tierischen Feinde by Eeh, which is one 

 of the latest economic works on European insects, contains a brief account of a 

 number of species in the genus Phyllohius, and states that of the numerous species 

 in the genus Polydrusus only a few are so abundant as to be destructive. Four 

 species are mentioned, but there is no reference to impressifrons. While Nord- 

 linger,* Kaltenbach° and Hess* discuss other species in either of the two genera, 

 none of these authors refer to the insect under discussion. In Fauna Austrica, 

 Redtenbacher' gives a brief description of impressifrons, and states its habitat is 

 North Germany. Jager' gives its distribution as Germany and France. In 1888* 

 Schilsky listed the species and states that it is plentiful throughout Germany. 

 Turning now to England, Eye*" in his work on Brtish Beetles lists a good number 

 of species of the genera, Phyllohius and Polydrusus, in which impressifrons is 

 not definitely included. Theobald" in his Insect Pests of Fruit makes no reference 

 to any species of Polydrusus, but discusses with some detail several Phyllohius 

 species as Phyl. calcaratus, maculicornis, ohlongus and uniformis. He states that 

 various leaf weevils are found on all kinds of vegetation and that several species 

 are common to not only many kinds of fruit but also to various forest trees and 

 shrubs. Two species more prominent than others on fruit trees and bushes arc 

 the Green Leaf Weevil {Phyl. maculicornis) and the Oblong Leaf Weevil {Phyl. 

 ohlongus). The Glaucous Leaf Weevil {Phyl. calcaratus) is also mentioned as 

 doing serious damage to black currant bushes. It usually occurs on alders and 

 various low bushes and hedges. With respect to impressifrons Professor Tlieobald 



'Zimmerman, Hugo, Die Obstbauschadlinge aus der Familie der Riisselkafer. 



'Judeich, J. F., and Nitsche, H., Forstinsektenkunde, Bd. I, pp. 407-411. 



*Reh, L., Handbuch der Pflanzenkrankheiten, Bd. 3, p. 539. 1913. 



* Nordlinger, H., Die kleinen Feinde der Landwirthschaft, 1855. 



•Kaltenbach, J. H., Die Pflanzenfeinde, 1874. 



•Hess, W., Die Feinde des Obstbaues, 1892. 



'Redtenbacher, Ludwig, Fauna Austrica, Die Kafer, Wlen, 1858. 



•Jager, G., Kaferbuch (C. G. Calwer), p. 420. 



•Schilsky, J., Systematlsches Verzeichnis der Kafer Deutschlands, 1888. 



"Rye, Edward C, British Beetles, 1886. 



" Theobald, F. V., Insect Pests of Fruit, 1909. 



