DINEURA STILATA. 13 



The head of the larva is light shining green, with a 

 yellowish tinge, which becomes more intense towards 

 the end of the larva's active life ; on the top are 

 scattered short white hairs. The eye- spots black ; 

 mouth brownish ; tips of mandibles black. The body 

 is flattish; the thoracic region is broader than the 

 abdomen ; the colour is light green throughout, except 

 that the segmental divisions are white. Legs glassy 

 green, with brown claws, black at the tips. Generally 

 the dorsal canal shines through as a darker green 

 band. 



The pupa state is passed in the ground, where the 

 thin, black, oblong cocoon is spun. It remains un- 

 changed till the beginning of May when it becomes a 

 bright green pupa. 



D. virididorsata is an extremely common species in 

 the birch woods in Scotland. In England it would 

 seem to be somewhat rarer, but still equally widely 

 distributed. It is a species which shows great colour 

 variation, while the position of the nervures relative 

 to each other (and consequently of the size of the 

 cellules) is also very irregular. The transverse radial 

 nervure is sometimes absent. 



Continental distribution : Sweden, Germany, Hol- 

 land, France. 



2. DlNEURA STILATA. 



Vol. I, PL III, fig. 7, Larva; PL XIV, figs. 5 ? , 5 a, 

 Cerci. Vol. II, PL XIV, fig. 6, Saw. 



Tenthredo stilata, Klug, Berl. Mag., viii, 72. 



mediocris, St. Farg. et Serv., Enc. Meth., x, 570 



(1825). 

 Nematus licolor, Ste., 111., vii, 27, 2 (ex type). 



apicalis, Ste., 111., vii, 32, 22 (ex type). 

 Selandria scapularis, Ste., 111., vii, 46, 6. 

 Nematus posticus, Foer., Verli. pr. Rhein., xi, p. 349. 

 Dineura stilata, Htg., Blattw., 227, 2 ; Cam., E. M. M., xiii, 



175 ; Fauna, 27, 2 ; Andre, Species, 

 i, 92 ; Cat., 11,* 2. 



flaveola, Evers., Bull. Mosc., xx, 21. 



