GENUS MEGALODONTES. 85 



joints in the antennae, these, too, having the third joint 

 greatly enlarged ; and in the large exserted ovipositor. 

 There are only two European genera. Pamphilius 

 with three spines in posterior tibiae, and with setaceous, 

 simple- jointed antennae; and Megalodontes with two 

 closely situated spines in tibiae, and antennae with the 

 joints dentated, and never more than twenty-two in 

 number. 



Genus MEGALODONTES. 



Megalodontes, Latr., Hist. Nat. Crust. Ins., iii, 302. 

 Tarpa, Fab., S. P., 19; Klug, Ent. Mon., 183. 



Antennas 14 22-jointed, short, often with short pectinations on some 

 of the joints; the basal third joint usually large. Head large, some- 

 what broader than long ; trophi greatly elongated ; thorax broad, con- 

 siderably arched on the back. Posterior tibiae spined. Wings with 

 two radial and four cubital cellules, of which the second and third 

 receive each a recurrent nervure. Lanceolate cellule with an oblique 

 cross nervure. Posterior wings with two middle cellules. Transverse 

 radial nervure received in the second cubital cellule. 



The pectinations on the antennae are usually confined 

 to the middle joints, and are never on the basal three. 

 In length they vary in the different species, and afford 

 excellent specific characters. The head is scarcely so 

 broad as the mesothorax ; it is slightly concave behind ; 

 broader than long, moderately rounded on the top. 

 The sutures are narrow, and by no means conspicuous, 

 and there are no raised parts on the vertex. Ocelli 

 not forming a triangle, the front one being placed not 

 much in front of posterior ; they are situated well for- 

 ward. Eyes projecting, placed well in front on the 

 sides, not reaching to the base of the mandibles. Be- 

 tween the antennae the front projects a little ; the 

 antennae originate from a large depression on either 

 side of this. Clypeus amalgamated with the upper 

 part of the head, there being no trace of segmentation ; 

 semi-truncated at the apex, broad, labrum small, quad- 

 rangular. Mandibles curved, two large sharp teeth at 

 apex. The inner mouth organs are all much lengthened, 

 which makes them not unlike the sucking oral appa- 



