THE CANADIAN ENTOMOLOGIST. 215 



NOTES ON TENTHREDINOIDEA, WITH DESCRIPTIONS OF 



NEW SPECIES. 



BY S. A. ROHWER, WASHINGTON, D. C 



Paper XL — (Genera of PAMPHiLiiNiE and New Species). 



Pamphiliin.e (oHm Lydince). 

 Linnaeus in 1758 divided the genus Tenthredo into six divisions ; all 

 except the last, which was composed of species known in immature stages 

 only, are now recognized as families or subfamilies. The fifth of these 

 Linnsean divisions of Tenthredo contained species now placed in the sub- 

 family Pamphiliinpe. Latreille (Hist. nat. Crust, et Insect, III, p. 303, 

 1802) was the first to give this division of Tenthredo a name, when he 

 founded his genus Pamphilius on Tenthredo sylvatica Linnasus — the 

 genus bting monobasic* 



Fabricius (Syst. Piez., p. 43, No. 5, 1804), apparently overlooking 

 Latreille's name of 1802, founded his genus Lyda on sixteen species, 

 which have been placed in various segregates of Pamphiliinse. Curtis 

 (British Entomology, 183 1) fixed the type of the genus Z^j/^a as Tenthredo 

 sylvatica Linnaeus, a species originally included, making the genus a 

 synonym of the older name Pamphilius — the two genera having the same 

 types. 



Panzer (Fauna Ins. Germ., Vol. VIII, p. 86, 1805) proposed another 

 name, Cephaleia, for the same group, but the name has been restricted to 

 include only those species closely allied to Terithredo signata Fabricius, 

 so the name still holds good. 



A. Costa (Pros. Hym. Ital., Ill, p. 232, 1894) was the next to 

 propose names for the various groups of species, when he divided Lyda 

 into Acantholyda and Anoplolyda on the presence or absence of a super- 

 apical spur on the anterior tibiae. 



Rev. F. Konow in 1897 (Ann. K. K, Nathist., Hofmus, XII, pp. 

 1-32) considered these insects as a tribe, Lydides, and recognized five 

 genera and four additional subgenera. Since then his arrangement has 

 been followed, and with the exception of Liolyda Ashmead (Can. Ent., 

 p. 209, 1898), no new segregates have been proposed. 



*Monobasic is a term used to indicate that a genus was founded on one 

 species. In a certain sense it is synonymous with the current use of monotypic, 

 but monotypic had best be used in a restricted sense for those genera which are 

 strictly monotypic, i.e., containing only one species. Monotypic is an 

 unfortunate name, for all genera are necessarily monotypic, as they can have 

 only one type. 

 June, 1910 



