66 



HOMOPTERA 



1 . Usually but not always a porrect pronotal horn or protuberancc ; tegmina 



short, extendingfor not more than oiie-third their length beyond poste- 



rior process Platycotis Stal. 



2. Pronoial horn always present but extending directly forward, the upper 



margin even with the dorsum; tegmina long, extending for at least half 



their length beyond posterior process Orthoplophora Fowler. 



B. Head narrow, nol as wide as base of posterior process; posterior process short 

 and shield-shaped 



1. Pronotum with porrect frontal horn Stalotypa Metcalf. 



2. Pronotum without frontal horn Mf.tcalfiella Goding. 



II. Posterior process long, usually reaching tips of tegmina ... .... Umbonia Hurineister. 



23. GENUS PLATYCOTIS Stal 



Platycotis Stal, Hem. Fabr. II : 36 (1869). 



Characters : Large, heavy-bodied, triangularly-shaped insects often marked with stripes and 

 usually, hut not always, bearing a frontal horn. The presence or absence of this pronotal horn varies 

 even within a species; it is not a sexual character nor is it indlcati ve of any geograpiiical location. When 

 present, the horn is always porrect or more or less upright, never extending directly forward. The head 

 is very broad, at least twice as broad as high, with the ocelli much nearer to each other than to the eyes. 

 The posterior process is short and rather flat, seldom reaching the end of the abdomen. The tegmina. 

 likewise, are short, extending only slightly beyond the posterior piocess and have five apical and two 

 discoidal cells. The hind wings have three apical cells. The hind tarsi aie ridiculously small as 

 compared with the tarsi of the front and middle pairs of legs. 



Type viltata Fabricius. 



Geographical distribution : 



i. aciitangula Stal, Bid. Memb. Kan. 263. 2 (1869). 



2. cornuta Phimmer, Ann. Ent Soc. Amer. XXIX : 4. 683 (1936). 



3. discreta Fowler, B. C. A. II : 42. 3 (1894). 



4. histrionica Stal, Hem. Mex. 69. 414 (1864). 



5. maritimus Van Duzee, Proc. Calif. Acad. Sci. VII : 11. 287 (1917). California. 



minax Goding, Ent. News. III : 109 (1892). 

 asodalis Goding, Ent. News, III : 110(1892). 



6. nigrorufa Walker, List Hom. B. M. SuppL I43(i858). 



7. spreta Goding, Cat. Memb. N. .\. 4^6. 197. (1894). 



8. straminicolor Stal, Rio Jan. Hem. II : 25. 4 (i858). 



9. tuberculata Fairmaire, Rev. Memb. 273. 18 (1846). 



ornala Fairmaire, Rev. Memb. 274. 19 (1846). 



10. vittata Fabricius, Syst. Rhyng. 20. 23 (i8o3). — Pl. 2, fig. 22. 



sagillala Germar, Mag. Ent. IV : 19. i5 (1821). 



belligira Say, Journ. Acad. Nat. Sci. Phila. VI : 3o2 ^1824) 



quadrivitlata Say, Journ. Acad Nat. Sci. Phila. VI : 3oo (1824). 



Mexico. 

 Mexico. 

 Guatemala. 

 Mexico. 



Mexico, Guatemala. 



Mexico. 



BraziL 



Mexico, California. 



Brazil, Mexico, United States. 



