70 GENUS TENTHREDO. 



Eyes not converging, not placed near the base of mandibles. 



Apex of labrum incised. Sciopteryx. 



B. Coxae large, reaching to the apex of the third abdominal segment. 



Antennae long, filiform ; thorax on the sides and breast more or 



less white. Pachy protasis. 



AntennsB short, thick; thorax rarely, and if so but slightly, 



marked with white. Macrophya. 



Tenthredo, Section 5, Htg., Blattw., 303. 

 Tenthredopsis, in part, Thorns., Andre. 



Wings with two marginal and four submarginal cellules. 



Lanceolate cellule subcontracted, or more usually with a straight 

 cross nervure. Posterior wings with two median cellules in both sexes, 

 the radial cellule not appendiculated. 



Antenna short, rarely longer than abdomen ; filiform or setaceous, 

 rarely thickened at the apex ; bare, except the thick, ovate, basal joint, 

 which is pilose, the third joint more than a third (generally) longer 

 than the fourth. 



Legs long, claws bifid ; hinder trochanter reaching to the apex of the 

 second abdominal segment. In some species the $ has the hinder 

 tibiae and tarsi thickened and flattened. 



Head long, broad, somewhat cubital. 



Clypeus deeply incised, rarely truncated at apex, the apical comers 

 acutely pointed, sometimes projecting. 



Labrum large, oval, or quadrangular at the apex. 



Abdomen slightly depressed above, thickened in the middle at the 

 sixth segment, sharply or bluntly rounded at the apex. Blotch dis- 

 tinct. 



Scutellum generally raised, sometimes pyramidal, rarely flat. Man- 

 dibles long ; the apical tooth long, curved ; the second blunt, widely 

 separated from first ; the third generally split in the middle into two- 

 blunt projections. Labium with the two outer lobes broad, rounded 

 externally, square above. Maxilla with the inner lobe bulging out 

 roundly at the lower (exterior) side, narrowed into a sharp, curved, 

 tooth-like projection at the apex; outer lobe bluntly ovate at apex, 

 narrowed slightly at the sides. 



In coloration the species belonging to this genus show 

 considerable diversity. Generally they have mixtures of 

 black and red, or black and yellow, with antennae either 

 entirely black or with the apical joints white or entirely 

 yellow. Mixtures of green and black are also common > 

 while some of the East-Indian forms are splendidly 

 metallic, green, or blue. With most species the wings 

 are hyaline, but these organs are sometimes yellowish, 

 more rarely blackish or bluish. 



