402 



p.s rcHB. 



[September iSyq, 



sails) was a true Alebra. The other 

 four (part of the twelve mentioned 

 above) are not Alebra, and although in 

 one species a wing is figured, yet no 

 mention is made of its peculiar struc- 

 ture. These species, which Gillette 

 describes under Alebra, could not pos- 

 sibly be placed in that genus by the 

 use of his own synopsis immediately 

 preceding the descriptions. 



The last of the fourteen species men- 

 tioned above ditiers from all the rest in 

 wanting the elytral appendix, though it 

 possesses a typical Alebra wing and 

 has the general habitus of an Alebra. 

 It represents the type of a new genus 

 which I shall call Eualebra. 



The relation of these genera to others 

 of the tribe Typhlocyhini may be shown 

 best in tabular form, as follows : — 

 Appendix present. 



Wing distinctlv margined around 



apex, Alebra. 



Wing with margin obsolete around 



apex, Protalebra n. gen. 



Appendix absent. 



Wing margined and with 



Three apical cells (exclusive of 

 costal), E/talebra n. gsn. 



Two apical cells. 



Body shoit, robust, * Erythria. 

 Body comparatively long, slen- 

 der, Dicrancura. 

 One apical cell, Empoasca. 



* This group has no known representatives in the Amer- 

 ican fauna. Its reduction would only be justified by a study 

 of very complete and extensive European material. Euro- 

 pean students who have had that opportunity consider it 

 distinct. The difference in form, provided it is constant 

 throughout the two assemblages of species, is as good a 

 generic character as any. 



Wing not margined and with 

 Three apical cells, Eupteryx. 



Two apical cells, Typhlocyha. 



Enahbra smit/iii n. sp. — Length 3 inm. 

 Vertex very large, as long as pronotuin, 

 roundly angled in front and swollen out 

 laterally a little in front of the eyes, this last 

 being a character not before observed in the 

 tribe. The face in the single specimen col- 

 lapsed in drying. Head and below sordid 

 whitish. Mai^in of vertex above antennal 

 sockets, apex of first antennal joint, middle 

 femora apically and middle tarsi at base, 

 blackish. Pronotum and basal angles of 

 scutel with fairly numerous small brown dots, 

 the former in the middle behind with a large 

 brown cloud ; the latter with two larger round 

 dots at middle, and apex, dark brown. 



Elytra smoky subhyaline, with brown 

 markings, the base of the clavus suffused 

 with sanguineous. Base and apex of clavus, 

 base of corium and entire apical portion to 

 just within the anteapical cells, with fine 

 brown dots. A very irregular brown band 

 extending from middle of clavus to apex. of 

 costal cell. A large rectangular white spot 

 on iniddle of costal area. 



Described from a single male in the 

 Herbert H. Smith collection, taken at 

 Ciiapada, Brazil. This prettily marked 

 little species presents more remarkable 

 characters than any other Typhlocybid 

 known to me, and is the type of the 

 genus. 



Protalebra siitgularis n. sp. — Length 3.5 

 mm. Vertex strongly produced and angled 

 apically, plane, as long as or a little longer 

 than pronotum. Basal half of vertex, prono- 

 tum, and basal half of scutel, orange, darker 

 on the pronotuin. Hind margin of pronotuin 

 narrowly white, the white narrowly margined 

 internally with black. Anterior margin of 

 head narrowly black, bordering this below 



