TENTHREDO RUEIVENTRIS. 145 



has further 2 — 3 transverse rows of brown warts, 

 ending in a short brown hair. Each segment (except 

 the first three) has over the legs a brownish splash. 

 The head is shining, with black eye spots ; the claws 

 are brown. At the last moult the larva is shining; 

 the markings remain, but are brighter. 



Tenthredo velox (Vol. I, p. 80). 

 The (? of this species is T. biguttata, Klug. 



Tenthredo rueiventris (Vol. I, p. 81). 



A specimen of this species from Pitlochry in 

 Perthshire has the pleurae quite black ; one from 

 Plymouth has the pleuras and sternum white, splashed 

 with red, and the head white except above. 



The larva is described by Brischke (1. c, 118, pi. viii, 

 fig. 6). It feeds on Salix caprea, 8. aurita, S. helix, 

 Alnus glutinosa and A. incana, Spiraea ulmaria, and 

 Pteris aquilina. It is 22 mm. long, transversely 

 wrinkled, light brown, the back of a darker brown 

 with still darker reticulated markings. On each seg- 

 ment before the middle of the fore margin are stripes 

 which proceed obliquely backwards, bordered by a 

 lighter colour. Over the legs are scattered spots and 

 points, and each segment has two rows of distinct 

 white warts. Head reddish-brown, shining, shortly 

 pilose, the top of a darker brown. 



At the last moult it becomes shining^ reddish-brown 

 or brick-red, with two dark brown oblique stripes on 

 each segment. 



The eggs (in one case ten on a leaf) are placed in 

 openings in the leaf. The young larvse are like the 

 old, but brighter coloured, and have a bright brown 

 head. 



VOL. iv. 10 



