388 HETEROMERA. 
basal joint angularly produced within. The following key will assist in the identifica- 
tion of the Central-American species :— | 
Upper surface uniformly dull cyaneous . . . . oe ew ee ee) 6Species I. 
Head and thorax black, the elytra spotted or fasciate - oe ee we). Species 2-4. 
Head and thorax luteous, the elytra black . ©. . 2. 1. ee Species 5. 
Head and elytra black ; the thorax flavous, with a large angulated black . 
median patch . . . . . toe ee ew wl ee ee) Species 6. 
Head and elytra black, the thorax flavous, immaculate toe ew ee ee) Species 7. 
Flavous or flavo-testaceous; each elytron with a large basal and a large 
apical spot black © 6 ee ee ee Species 8, 9. 
Rufous or fulvous, the head not darker in front . . . . . « « ~ + Species 10-12. 
Fulvous, the head black infront . . . . . 1. +e + + + + + + Species 13. 
1. Tetraonyx pectoralis. 
Tetraonyx pectoralis, Haag, Stett. ent. Zeit. 1879, p. 257". 
Hab. Nicaraaua, Chontales (/anson).—CoLomBIa ?. 
One specimen from Chontales, agreeing perfectly with others from Colombia. Haag 
states! (perhaps by mistake) that the posterior margin of the mesosternum is bright 
rufous: in the specimens before me determined by him the mesosternum is entirely 
cyaneous and the posterior coxe are in great part luteous- or reddish-yellow*. A 
large species, of a uniform dull cyaneous or greenish-cyaneous colour. Z. pectoralis 
is very closely allied to 7. crassus (Klug), from Brazil, but differs from it by the denser 
and finer punctuation of the upper surface and by the cyaneous hind coxe. 
2. Tetraonyx sexguttatus. (Tab. XVIII. figg. 1-6.) 
Mylabris sexyuttatus, Oliv. Ent. iii. no. 47, p. 11, t. 2. fig. 15°. 
Lytta (Tetraonyx) sexguttata, Klug, Nova Acta Acad. Leop.-Carol. xi. p. 449°. 
Tetraonyx sexguttatus, Blanch. in Cuvier’s Régne Anim., Ins. i. t. 55. fig. 2°; Haag, Stett. ent. 
Zeit. 1879, p. 259°. 
Mylabris atrata, Fabr. Syst. Eleuth. ii. p. 83°. 
Tetraonyx proteus, Haag, Stett. ent. Zeit. 1879, p. 260°; Dugés, An. Mus. Michoacano, u. 
p. 106 bis”. 
Tetraonyx ochraceoguttatus, Dugés, La Naturaleza, v. p. 140, t. 4a. fig. 1°. 
Hab. Mexico, Oaxaca®, Mirador®, Vera Cruz®’® (Sallé), Jalapa (Hoge); GuatE- 
mata ®, San Gerénimo (Champion); Honpuras © (Sal/é); Nicaragua, Granada ° (Sa//é), 
Chontales (Janson); Panama, Bugaba, Volcan de Chiriqui (Champion), Chiriqui®.— 
South America, Surinam !, Brazil+, Rio Janeiro ?. 
An extremely variable species, five of the varieties of which have been named by 
* The same remark applies to his description of 7. bipartitus. 
