P. CAMEROX. HYMENOPTERA 



HYMENOPTERA I 



(All Families, except Apidae and Formicidae) 



P. CAMERON, 



New Mills. 



Phytophaga. 

 Oryssus Latr. 



i. Oryssus trifasciatus sp. nov. 

 Manokwari, 8 June. 



Black, densely covered with white pubescence, all the femora, the fore tibiae narrowly 

 in front, the greater part of the posterior and the base of all the tarsi red, wings fuscous- 

 violaceous, the base, a broad band before the stigma and a riarrower one at the apex, clear 

 hyaline; the costa, stigma and nervures black, the latter obliterated in the hyaline parts. Ç. 



Length 8.5 mm. 



Head coarsely rugosely punctured, the punctures running into reticulations in parts; 

 on the sides of the vertex are 4 smooth, transverse ledges, the lower of which are more 

 distinct than the upper. The latéral ocelli touch the eyes. Behind and close to the eyes is 

 a keel which commences at the top and reaches to the mandibles, the lower part being 

 thicker than the upper. Shortly below the lower ocellus is a transverse keel, which is thinner 

 in the middle than on the sides. The lower part of the face is broadly rounded, projecting 

 into a narrow keel on the lower edge ; above this it is depressed, smooth and shining. Scape 

 and pedicle of antennae bare, shining; the other joints densely covered with a dense grey 

 pile; the ist joint of the flagellum is narrower, more cylindrical and slightly longer than the 

 second. Parapsidal furrows broad, moderately deep ; in the centre of the mesonotum on the 

 basai half is a smooth, shining, broad, longitudinal line. The scutellum has the punctures larger 

 and more widely and distinctly separated than on the mesonotum ; at its base is a transverse 

 dépression, widened laterally and bordered behind by a keel. The apices of the abdominal 

 segments are smooth and shining; the last segment is more coarsely, rugosely punctured 

 than the rest ; the 4* and 5* not so closely as the basai. 



The discoidal cellules are completely obliterated and confluent with the cubital, thèse 



Nova Guinea. V. Zoologie. 6 



