FAMILY SCOLYTIDAE 471 



I would wish to record my deep obligation to my former instructor in 

 Entomology at the R.I.E. College, Coopers Hill, Mr. F. W. Blandford, 

 himself a well-known authority on the family ; to Lieut. -Colonel F. Winn- 

 Sampson, now engaged on work in this family and on the Platypodidae ; 

 and to that eminent authority, Dr. Max Hagedorn, for the great assistance 

 so generously accorded me in this branch of my work. 



The Scolytidae have been recently subject to a complete revision* by that accomplished 

 scientist Dr. Hagedorn, and unfortunately this revision has led to the disappearance of several 



well-established generic names, whilst the name of the family known 

 Classification. to generations of foresters disappears. Dr. Hagedorn has but followed 



the commonly accepted dictum in scientific nomenclature that priority 



should be recognized in every case, but it is peculiarly unfortunate that the necessity should 

 have arisen in such an important family economically to the forester as the Scolytidae, which 

 he now calls Ipidae. The well-known genus Tomicits becomes Ips, whilst Scolytus is known 

 as Eccoptogaster. It is inevitable that great confusion will arise owing to this revised nomen- 

 clature. I have deemed it therefore advisable to draw attention to the matter, in order that 

 future students may make a first acquaintance with this revised synonomy as well as with 

 the old one. In every case I have placed the revised generic name in brackets, but in order 

 to avoid confusion in a work designed essentially for the use of the forester I have kept to 

 the old and well-established nomenclature. 



Dr. Hagedorn adopts the now generally accepted view, which I have held for some years, 

 that the Platypodidae are a distinct family. He divides his family Ipidae (Scolytidae) into 

 four sub-families, according to the presence of pubescence, spines, bristles, or pubescence and 

 bristles on the edges of the middle jaw, to which he gives the names Pilidentatae, Spinidcntatae. 

 Saetidentatae, and Mixtodentatae. In the first sub-family he includes one tribe, in the second 

 seven, in the third two, and in the fourth one. In all save the first sub-family Indian genera 

 and species are well represented in the forests. 



The following are the characters of the sub-families : 



i. Pilidentatae. Edges of maxilla furnished with hairs, 

 ii. Spinidentatae. spines, 



iii. Saetidentatae bristles, 



iv. Mixtodentatae. ,, ,, hairs and bristles. 



Sub-Family I. Pi I, II UN i \i \i . 



This sub-family contains the tribe Phloeotrupinae, including the three genera Diictyli- 

 palpits, PhloeoborttS) and l^liloeotrnpcs. No Indian species of this sub-family are yet known 

 to be injurious in the forests. 



Sub-Family 2. SIMNIDKNTATAK. 



Edges of the middle jaw fringed with spines. This sub-family contains the largest 

 number of the at present known Indian genera, the whole of the injurious bark-boring and 

 bast-feeding pests coining here. The sub-family is divided into seven tribes, the Diainerinae, 

 Hylesininae, Crypturginae, Cryphalinae, Ipinae, 1 1 ylocurinae (no Indian species), an,! 

 Eccoptogastrinae. These tribrs include the important Indian genera niitincrus, 1 1 via */<-.>, 

 Hylesinus,Sphaerot/-ypes t Phloeosinus^ Chrai l -.\u*, Crvptitrgits. /\>l\'^ra/>hits. Cryphalus, 

 Coccotrypes, llryocoetes, /'ify<>f>/itli<>rits, TotnicHs '//>.vi, /Y/iv;y ;/,*, and Sci>lytns 

 (Eccoptogaster}. 



*Wytsman. Genera Insectoritm : Colcoptera, fain. Ifiidac. von Max Hagedorn 1910). 



