582 PROCEEDTNGS OF THE NATIOXAL MUSEUM. vol.46. 



LACCOCERA OBESA Van Duzee. 



Plate 45, fig.s. R, V. 



Laccocera obesa Van Duzee '97:244. — Swezey '0^:36. 

 DeJphacinus nhfuis Gillette '95:69. 



Very similar in general size and proportions to zonata; coloi- char- 

 acters similar but less marked, yellow more flavous, and black often 

 reduced to brown or even light brown; clypeal carinse often yellow, 

 as in vittipennis. Head relatively short, wdtli eyes almost or quite 

 as broad as prothorax, occasionally slightly broader; vertex almost 

 square, very slightly broader than long, sides quite parallel, produced 

 somewhat before eyes, less pitted than in congenors; frons similar in 

 shape, scarcely angulate; roundly obpyriform, narrower below than 

 above. Thorax similar in structure to vittipennis. Legs somewhat 

 striped brown and Hght flavous. Male pygofers shorter, margin but 

 slightly emarginate at base of genital styles; processes of anal tube 

 exceedingly short; genital styles very short and stout, scarcely half 

 as long as in vittipeniiis without median carina below and between 

 styles which is present in other two species. 



Redescribed from two macropterous and many brachypterous 

 females from Ormsby County, Nevada (Baker), and Colorado (Baker), 

 and one brachypterous male from Nevada. This species is quite 

 closely related to its congenors, but differs markedly in male genital 

 characters and to a less extent in cephalic characters; the coloration 

 is more or less a combination of the two species. 



LACCOCERA BICORNATA, new species. 

 Plate 45, fig. P. 



Size and general proportions similar to zonata; black and yellow, 

 as in that species, but clypeus and labrum, also, bright yellow; legs 

 yellow instead of flavous. Prmcipal differences are in color and male 

 genitalia; head and thoracic structure similar. 



Genital segment similar; anal tube very large, projecting caudad 

 more than in zonata, with ventral processes extremely long and acute, 

 resembling two recurved horns, extending fully two-tliirds of distance 

 toward base of genital styles ; styles shorter and much stouter, more 

 terete than in vittipennis, not flexed as in zonata, longer than in 

 ohesa, with carina very conspicuous below and between styles. 



Described from two males (brachypterous), from Colorado (Baker). 

 The female is unknown or else indistinguishable from zonata, although 

 the color should be rather constant. 



Type-specimen.— Qui. No. 15976, U.S.N.Mus. 



Genus JASSIDAEUS Fieber. 



Syn. macrotomeUa Van Duzee. 



This genus, not represented in the material before me, is charac- 

 terized by the two median carinse of the frons; vertex and frons 

 broad, latter more or less pentagonal: antennse reaching about to 



