MEMBRA ClDvE. 
54 
tibise long, ochreous, with a double row of black spots. Viewed from the back the 
pronotum shows one central and two side carinte. 
Size, 8x4 mm. 
Hope Coll. (Miers). 
Sub-divisions of genera may be carried too far, particularly in cases where 
characters run one into another. They often require individual arbitration to settle 
even the species. 
Stal unfortunately is often obscure in the definitions of his new genera, and 
mostly he fails in stating the species lie takes for his type. 
As to Tropidocera he says: “Thorax minus elevatus, dorso minus late foliaceous, 
anterices angulum, apice, rotundatum,” &c. &c. Vet. Akad. Handl. (2) viii. p. 41 
(1869). 
Undue multiplication of genera much harasses the student, and it leads to an 
involved synonymy. 
Tropidocera is not included in Canon Fowler’s “Monograph of Membracidee,” 
and it is not to be confounded with the previous Genus Tropidocyta. 
Genus: LEIOCYTA, Fowler. 
This genus has been separated from Tropidocyta by Canon Fowler, chiefly from 
the number of the carinse on the pronotum, and more characteristically from the 
tegmina showing two instead of three discoidal cells. I have not found these last 
areas easy to distinguish. 
About twelve species of Tropidocyta have been noted from America, and of these 
as examples of Leiocyta, Fowler quotes L. pallidipennis (Stal), I. cornutula (Stal), and 
L. nitida, all of which are figured in the J3.C.A. No venation is there drawn which 
would help much in their diagnosis. 
LEIOCYTA CORNUTULA, Stal. 
(Plate VII. figs. G, 6a, Gb.) 
Leiocyta cornutula, Fowler, Tab. I. fig. 22, 22a, p. 11. Tropidocyta cornutula, Stal. 
The peculiarity of this species is the very short porrect horn on the pronotum. 
It is not certain whether this adjunct is simply a sexual character. L.pattidi- 
pennis may prove to be the $ sex of L. cornutula (see Fowler, p. 14.) 
Copied by permission from the B.C.A. 
Leiocyta shows only two discoidal areas (vide Plate A II. fig. 6b.) 
Size, 6x3 mm. 
Habitat. —M e xico. 
