2 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. GO. 



The illustrations for the adults were prepared by Miss Eleanor 

 Armstrong from sketches made by Mr. Rohwer, by use of a Leitz 

 projection apparatus. The illustrations for the larvae were made 

 by Mr. Middleton. 



EXPLANATORY. 



In this paper the external genitalia of the female is considered as 

 being composed of three primary parts. The outer part is called 

 the sheath. The inner parts, or that which has heretofore usually 

 been loosely called the saw, are grouped together under the name 

 ovipositor and the upper (fused dorsally) pair of pieces is termed 

 the lance and the lower pair the lancets. In preparing the ovi- 

 pository for mounting, the lancets are removed, separated from each 

 other and from the lance and are mounted as separate parts, while 

 the two parts of the lance are mounted as one. 



The terminology used for the larva is that adopted in two recent 

 papers^ by the junior author. 



Subfamily Cladiinae. 



Gladiinae Ashmead, Can. Ent., voL 30, 1898, p. 282 (part). 



Cladiinae MacGillitoay, Proc. U. S. Nat. Mus., vol. 29, 1900, p. 635 (part) ; 



Bull. 22, Conn. Geol. and Nat. Hist. Survey, 1916 (1917), p. 108 (part). 

 Cladiinae Rohweb, Proc. Ent. See. Wash., vol. 13, 1911, p. 224. 



As here treated the subfamily Cladiinae deals only with the genus 

 Gladius as treated by Hartig, Thomson and Cameron, and comprises 

 these species belonging to the subfamily Nematinae as defined by 

 Konow,^ in which the basal vein joins the subcosta close to the origin 

 of the cubitus. Both Ashmead and MacGillivray in recognizing 

 their subfamily Cladiinae placed more stress on the character of the 

 anal cell and therefore included the genera Platycam'pus and Ano- 

 plonyx. According to the senior author's opinion the anal cell, al- 

 though very useful in classification, is a character so subject to 

 modifications due to the use of the wing, that it does not necessarily 

 show subfamily relationships. He therefore prefers to use the posi- 

 tion of the basal vein as compared to the origin of the cubitus. 

 From the standpoint of the larvae the definition of the subfamily as 

 here used is much more satisfactory than when the genera Platy- 

 campus and Anoplonyx are included, because the larvae of species 

 that belong to these genera and which we have been able to study, 

 have characters which place them in the subfamily Nematinae rather 

 than the subfamily Cladiinae. 



2 Middleton, William. — Suggested Homologies between Larvae and Adults in Sawflies, 

 Proc. Ent. See. Wash., vol. 23. no. 8, 1921, p. 173. 



Middleton, William. — LeConte's Sawfly, an enemy to young pines, Journ. Agi-ic. Re- 

 search. U. S. Dept. Agr., vol. 20, no. 10, 1921, pp. 741-760, pis. 88-92. 



"Gen. Ins.. fasc. 29, 1905, ij. 45. 



