FAM. MEMBRACID^ i35 



Geogpaphical distribution : Of the seven described species, four are from the United States 

 and three are from South America. 



1. eredus Funkhouser, Journ. N. Y. Ent. Soc. XXVII : 4. 272 (1919). Brazil. 



2. juHiperinus Ball, Journ. Wash. Acad. Sci. XXVII : 11. 481 (1937). Arizona. 



3. lateralis Funkhouser, Bull. Brook. Ent. Soc. XXXI : i. 21 (1936). Illinois. 



4. maculatus Funkhouser, Journ. N. Y. Ent. Soc. XXV : 2. 162 (1927). Brazil. 



5. septemfasciata Goding. Trans. Amer. Ent. Soc. LII : 108 (1926). Ecuador. 



6. subulaius Say, Journ. Acad. Nat. Sci. Phila. III : 3oo. 8 (i83i). Southern U. S. 



7. trilineaius Funkhouser, Ent. News. XXIX : 5. 186 (1918). — Pl. 7, Louisiana. 



fig. 9 I . 



106. GENUS TRACHYTALIS FOWLER 



Trachytaiis Fowler, B. C. A. II : ii5. 2. (1895). 



Characters ; Small inconspicuous insects characterized by the elongate unarmed pronotum 

 and the fact that the tegmina have only four apical cells and one discoidal cell. Head subquadrate, twice 

 as broad as long; base feebly sinuate; eyes small and ovate; ocelli inconspicuous, twice as far from each 

 other as from the eyes and situated on a line drawn through centers of eyes; inferior margins of 

 genae sinuate; clypeus extending for about half its length below inferior margins of genae but continuing 

 the apical outline of the face made by these margins, tip rounded. Pronotum low and convex, more 

 or less depressed anteriorly; dorsum nearly straight; no suprahumerals; metopidium sloping, broader 

 than high; humeral angles well developed, blunt, triangular; median carina faintly percurrent ; sides 

 of pronotum with no indication of a semicircular impression; posterior process heavy, tectiform, usually 

 decurved at the tip which reaches to a point about halfway between internal angles and tips of tegmina. 

 Tegmina hyaline with basal and costal areas sparingly punctate; only four apical cells; one very large 

 pentagonal discoidal cell; apical limbus very broad. Legs simple; hind legs much longer than the 

 others and hind tarsi much the longest. 



Type isabellina Fovvler. 



Geographical distribution : A genus represented by two Mexican species as follows : 



1. distinguenda Fowler, B. C. .\. II : ii5. 2 (189^). — Pl. 7, fig. 92. Mexico. 



2. isabellina Fowler, B. C. A. II : ii5. i (1895). Mexico. 



GENERA OF TRIBE AMASTRINI GODING 



I . Corium with three discoidal cells ; ihird apical cell transverse 

 A. Dorsum without ttimid elevations 



1. Pronotum arcuate, comf>ressed laterally Amastris Stal. 



2. Pronoium comex, dorsum nearly straight 



a. Base of third apical cell of corium angulate; venation irregular ; 

 tegmina largely coriaceous 



b. Head extending obliquely forward Tynelia Stal. 



bb. Head stratght, perpendicular Boethoos Kirkaldy. 



aa. Base of third apical cell a straight line ; venation regular ; teg- 



mina hyaline Vanduzea Goding. 



