80 [September, 



A NEW SPECIES OF NJEMATUS FROM ENGLAND. 

 BY P. CAMERON. 



Nematus purpurea, sp. n. 



Black, covered with close, pale pubescence ; labrum, palpi, tegulae, apical hal 

 of coxse, femora at base and apex, tibiae and tarsi, whitish-testaceous ; flagellar 

 brownish beneath ; base of costa and of stigma clear white, the rest of costa ani 

 the stigma at apical half fuscous. Antennae closely pilose, a little shorter than th 

 thorax and abdomen together, the 3rd joint, if anything, longer than 4th. Clypeu 

 incised. Antennal fovea large, deep, round, shining in the centre ; frontal area obsc 

 lete ; an indistinct fovea below the front ocellus ; vertex raised, the lateral suture 

 broad, there is an indisi Inct transverse one behind. The head and thorax are finel 

 punctured, not very shining, abdomen smooth. The Ist transverse cubital nervur 

 semi-obsolete ; 3rd cubital cellule longer than broad, of nearly equal breadt 

 throughout ; 2nd recurrent nervure received a little in front of 2nd transverse cub 

 tal. The lower median cellule in hind-wings shorter than upper. The femora ha^ 

 a more brownish tinge than the tibiae or tarsi ; the black is not continuous, beir 

 absent from the sides and to a certain extent from the lower portion. Tarsi more ( 

 less fuscous above (especially the hinder) ; cerci testaceous, as long as the hind spur 



Length, 2 lines. 



A narrower insect than JSf. leucostigma, and readily known froi 

 it by the black clypeus, much larger antennal fovea, darker cost' 

 longer 3rd cubital cellule ; by the 2nd recurrent nervure being receive 

 much nearer the 2nd transverse cubital, and by the more denser 

 pilose body, which is also less shining. N. nigroUneatus, whic 

 agrees with it so closely in habits, is a larger insect ; its legs ai 

 darker coloured, the femora and tarsi being for the greater pa 

 black, the stigma has the apical half black ; the pronotum is edg( 

 with white at the base,, the 3rd cubital cellule is dilated at the ape 

 In having the flagellum brownish beneath, it differs from most of t: 

 species. 



The larva lives on Salioc purpurea, the leaves of which are rolL 

 down at the edges like what is done by Nematus nigrolineatus ai 

 Cecidomyia clausila. It is clear greenish-glassy, rather stout, becomii 

 suddenly attenuate at the anus, and bears no black marks on t 

 hind segments, thus differing from most of the leaf-rolling larv 

 The head is small and shiniug, clouded with grey, vertex black. 



This interesting discovery we owe to that indefatigable observ 

 Mr. J. E. Fletcher, of Worcester, who found the larvae near tl 

 place, and managed to rear the images. 



Grlasgow : August, 1884. 



