NEMATUS COMPRESSICORNIS. 55 



14 (15) Antennae short, thick, compressed, and produced into a point 



at the apices of the joints; tegulse clear white, stigma 

 fuscous. Compressicornis. 



15 (14) Antennae long, filiform, not compressed ; tegulae black or dull 



testaceous, stigma testaceous. Fulvipes. 



3. NEMATUS COMPRESSICOENIS. 

 PL VIII, fig. 3, Larva; PL XYI, fig. 3, Saw. 



Tenthredo compressicornis, Fab., S. P., 38, 46; Lep. Mon., 126, 



374. 

 Nematus platycerus, Htg., S. E. Z., i, 27. 



vallator, Voll., Tijd. Ent., i, 191, pi. 12 ; Zool., s.s. 7855 ; 



Kalt, Pli., 558. 



cebrionicornis, Costa, F. N. Tenth., 20, pi. Ixiv, f. 4; 



Andre, Species, i, 109 ; Cat., 15,* 

 42. 



compressicornis, Andre, I.e., 112; Cat., 15,* 41 ; Br. 



and Zad., Schr. Ges. Konig., 

 xxiv, 123. 



callicerus, Thorns., Opus., 619, 12. 



Black, shining, covered sparsely with palish down; the palpi, 

 labrum, tegulse and legs reddish-yellow, coxae at the base, the apex of 

 posterior tibiae and the tarsi black ; the femora at the base and the 

 tibiae paler than the other parts of the legs ; cenchri large, clear white. 

 Antennae a little shorter than the thorax and abdomen, thickish, the 

 joints produced on the underside ; the third joint is a little longer than 

 the fourth. The vertex is smooth, faintly punctured, almost shining ; 

 frontal sutures invisible ; antennal foveae broad, but rather shallow ; 

 clypeus almost truncated ; abdomen short, thick, slightly keeled above ; 

 the cerci long, black. Wings sub-hyaline, having a fuscous tinge ; the 

 costa and stigma testaceous, almost fuscous. The third (second) trans- 

 verse cubital cellule is small, almost quadrate, slightly dilated towards 

 the apex. 



The < has the antennae thicker and more compressed than in the ? , 

 the joints are more sharply produced beneath, and become more atten- 

 uate towards the apex ; the third and fourth joints are also equal in 

 length. The abdomen is very much attenuated towards the apex. The 

 labrum is black. 



Length 3 lines. 



The larva of this species was discovered by Van 

 Vollenhoven on a poplar (Populus dilatata) in May, 

 also feeding on the Italian form according to Kalten- 

 bach, and on P. nigra according to Mr. Fletcher. Vol- 

 lenhoven states that when young it eats small round 

 holes in the leaves, and around them places small white 

 projecting points formed of dried secretion from the 



