90 GENUS PAMPHILITJS. 



in Britain, while still others which were recorded by 

 them have been proved, after the lapse of many years 

 by the capture of fresh specimens, to be truly native. 

 The nativity of Megaladontes for the present must be 

 regarded as sub judice ; and on the whole less harm 

 will be done by describing them here, than by their 

 omission. 



Genus PAMPHILIDS. 



Pamphilius, Latr., Hist. Nat. Crust. Ins., iii, 303 (1802). 



Lyda, Fab., S. P., 43 (1804). 



Cephalcia, P/., F. G., Heft 86, pi. ix (1805). 



Cephaleia, Jur., Hymen., 67. 



Acanthocnema, Costa, F. N., p. 2, I860. 



Antennae setaceous, 18 37-jointed, the basal joint long, the third 

 and fourth often lengthened; inserted over the clypeus. Wings with 

 two radial and four cubital cellules ; the second cubital cellule receiving 

 the transverse radial nervure ; transverse basal nervure received in first 

 radial cellule. 



Posterior wings with two middle cellules. Posterior tibiae with three 

 separated spines. Head and body flat, wide ; sides of abdomen acute. 



The mandibles are large, curved, and provided with 

 two or three teeth at the apex, the apical tooth being 

 usually large. Clypeus immoveably joined to the 

 upper part of head, often dilated in the middle, rounded 

 at the apex. The basal joint of maxillary palpus 

 shorter than second ; third and fourth much larger 

 than that; fifth small, not much longer than second; 

 the apical is the longest. The second joint of the 

 labial palpus is the longest, next is the third, the fourth 

 and basal subequal. In most species the sutures in 

 the vertex are deep and well defined, and may be either 

 parallel or converge more or less in front ; the front 

 has often the sutures well defined. Eyes small, oval, 

 not reaching to the base of the mandibles. 



Apart from the difference in the number of the joints, 

 the only noteworthy point in regard to the antennae is 

 that the relative length of the third and fourth joints 

 varies. They may be nearly equal (inanitus), or the 

 third may be double or treble the length of fourth 

 (depressus, &c.). 



