30/ 



huge lieterogenous group, drifting into the AgalHinae via Tar- 

 tessus and Epithalamiiim, and into the Tetigoniinae via Macro- 

 ceratogonia. 



(2) Acoccphalina of Van Duzee (not the Acocephahdae oi 

 Edwards) should, 1 think, be inchuled in the above; or if nt)i, 

 they would be separable''^ by the dorsal position of the ocelli, the- 

 degeneration of the organs of flight appearing of comparatively 

 little account. Eiipclix 1 would place here, but Platyinctopiits 

 and its allies are certainly Phryiioiiiorphinc. 



(3) Enptcryginac, despite Jncoiio, are a well marked group. 



(4) Pcnthimiinac (Gyponina of Van Duzeej have very lit- 

 tle to do with the Tetigoniinae except tliat the ocelli are dorsal. 



(5) Tetigoniinae correspond to the Tettigonida of Van 

 Duzee; they probably include the curious Macroccratogonia. 



(6) AgalHinae (Bythoscopida, Van Duzee) are difficult, as 1 

 have said before, to separate sharply from Jassinae. 



(7) Ledrinae are well marked, but have something of the 

 appearance of Doryccphalus, except that the ocelli are dorsal; 

 Ledra is an extreme 'form. 



(8) Sfenocotinae are exclusively Australian, allied to Ledrinae 

 but the ocelli are placed in separate grooves on the top of the 

 rather thin head. 



(9) Kaliavaliiinae, monotypical, strongly recalling certain 

 membracine characters, ocelli placed somewhat as in Stenoco 

 tinae, but head not thin. Legs very fee'bly bristly. 



(10) The MegopJithaJniinae arc possibly to be i)iaced here. 



(11) The Uldpiiiac are probalilv niem1:)raci(l. 



(3) Osboni's I'ic'Zi.'s on Pliylogeiiy. 



1 cannot conceive on what grounds the learned Professor con- 

 siders the IVtigoniidae to l)e so highly organized. He instances 

 tlie structure of the pronotum, head, scutellum and tibiae, etc., 

 in the other families, but is silent as regards the special virtues 

 of the Jassids- 



To me the Tetigoniidae (and especiallv Phrynornorphus, Del- 

 toeephaJus, etc.), seem far the most primitive of Leaf-hoppers. 

 Tlieir head, thorax, legs and genital segments seem to be of 

 the most ordinary, common type that one could find in the 

 larger orders of Tnsecta. The tegmina and wings are also ver\- 

 simple, thoug-'h this is perhaps the simplicity of degradation. 



