30 



6 A keel between the dorsal and ventral parts of the head 

 6 M cliclnircUa 



6a Xo such keel ( 7 ; 



7 Pronotnni strongly striate d)liqnely (8) 



7a Pronotum transversely striate, if at all ("•'*) . .■ (()) 



8 Anterior margin of dorsal part of head almost rectangu- 

 lar ; face flattish. (type viresccns) 7 Macropsis 



8a Anterior margin roinided : face cCfUvex (tvpe tiliac) . . . . 

 8 Pcdiopsi.; 



9 Ocelli immediately at the base of the ventral part of the 

 head 9 Epipsychidioii 



9a Ocelli well on the ventral part (10) 



10 Tegmina reticulate apically. Frons angulate in profile, as 

 also cl}-]:)eus. Hind tibiae with 2 or 3 strong spines. Last or- 

 dniary sternite (female) bipartite ( i r ) 



10a Tegmina not reticulate apically. Frons not angulate in 

 ])rofile, nor clypeu.s. Hind tibiae multispinulose. Last ordinary 

 sternite (female) not divided (i2) 



11 Last ordinary sternite (female) reaching the lateral mar- 

 gins of the abdomen 10 Eiiryuiclops 



I la Last sternite not nearly reaching the lateral margins 



II Eurymcli 



12 L(va not nearly touching the apical margin of the cl\peu> 



..-' •• ••• (U) 



12a Lora i)ractical]\- touching the apical margin '141 



13 Frons separated basall}' ; legs luore or less specialized. . . . 

 12 Alseis\i\^ 



13a Frons not se])arate(l basally ; legs normal f' 



13 Oiicopsis. ( =Bytlioscopiis auctt ; ty]x> fUn'icollis). 



14 Frons se])arated basally. Antennae inserted in a feeble 

 cavity, their bases free ( 15 ) 



14a Frons not sei^arated basally. Antennae inserted in a deep 

 cavity, beneath a ledge ( 17) 



15 F^'ronotum transversely striate; nymphs not h(M-ned nor 



dorsally serrate, (type sangiii)iolcntiis Provancher) 



14 (=!=**) Accratagallia^ 



15a Pronotum not striate; nymj^hs horned and serrate. . . (16) 



16 Posterior margin of vertex regularly cur\Td. the vertex 

 being obsolescent behind the eyes. Nymph witli two anterior 



** Sometimes, in Oiicopsh, the striation becomes a little oblicnic anteriorly. 

 *** Tiiesc characters were pointed out and used ior divisional purposes by Osborii 

 and Ball in their treatment of AyaUia. They are good genera, in my opinion. 



