l'HYl,I-0|'nA<;.V— TKNTMKKDINID.K. 



PHYLLOPHAGA. 



Thit« exteiiMivi' nericf^ is c(>n)|M)8e<l of" ii siii<rle timiily, comprising 

 those inst'cts popularly known as Saw-flies, which have the abdomen 

 attached 1)V its entire width to the exteiuled ]M)rtion of the meta- 

 tlmnix, which resi'inhles a scirmcnt and has often been described as 

 tin' tirst. The anterior tibite have two apical spurs, and the oviposi- 

 tor consists of tw(» compressed saw-like plates applied against each 

 other, and enclosed in a pair of outer sheaths. In the larva state 

 these instjcts are the most injurious of all hymenoptera, feeding upon 

 the leaves of trees and various plants, and often coni|)letely destroy- 

 iiiir the foliage. The characteristics of the series are given at length 

 by Mr. Norton in his admirable work mentioned below, and which 

 is easily obtainable by all who may wish to make a study of these 

 insects. 



Family TENTHREDINIDiE. 



The synopsis given below of this and the following familv, is taken 

 in great part from Mr. Norton's exhaustive monograph entitled, 

 "Catalogue of the described Tenthredinidic and Uroeeridse of North 

 America." (Trans. Am. Ent. Hoc. v»)l. i, June, 1867.) In that valu- 

 able ]»ai)er all the genera and s|)ecies known at that time to occur in 

 our fauna, as well as the family characters, etc., are described at 

 length. Later, in IHSO, the writer j)ublished, also in these Transac- 

 ti(jns, descriptions of many sj)ecies then considered to be new, adding 

 also a copy of the original descriptions (scattered through various 

 |iiiblications), of the sj>ecies described in the interim ; this was fol- 

 lo\vc(l by a list of the genera and s|)ecies with references and habitat.* 



Table of Subfamilies, 



Aiitennse 5-8 joiiiti'd, short, clavate (esct'pt in Acordnlecera) Cimbicinee. 



Aiitt'iiiia' 3-j()iTitiMl, third joint h)ng and often fmcate in % Hylotominse. 



Aiiteiinw 9-jointt'd, very ruiely H-joiuted (as in Lah'uiia); anterior winjfs witli 



one or two niarfiinal cells TenthredininsB. 



Antenna- 9 -i;5-jointed, irregular, third joint very long: anterior wings with three 



marginal and four sulmiarginal cells; ovijiositor long Xyeliinre. 



Antennte multiarticulate, with more than 13 joints Lydiinse. 



* Separata of these publications, under one cover, can be obtained from the 

 American Entomological Society, iis well as many of the papers referred to in the 

 following pages. 



