AMBRYSUS. 357 
6. Ambrysus melanopterus. (Tab. XXI. fig. 7, ¢.) 
Amébrysus melanopterus, Stal, Stett. ent. Zeit. 1862, p. 460'; Enum. Hemipt. v. p. 143’; Mont. 
Verh. zool.-bot. Ges. Wien, 1897, pp. 12, 19°. 
flab. Mexico !~3 (Mus. Vind. Ces.). 
The type is figured. Distinguishable by its oblong, somewhat parallel shape 
(approaching A. oblongulus in this respect), large size, and dark coloration, the 
posterior angles of the fifth connexival segment only produced. 
7. Ambrysus mexicanus. (Tab. XXI. fig. 8, 2.) 
Ambrysus mexicanus, Mont. Verh. zool.-bot. Ges. Wien, 1897, pp. 18, 21°. 
Hab. Mexico (Boucard, in Mus. Holm.'; Bilimek, in Mus. Vind. Ces.*). 
Very like A. guttatipennis, but smaller, smoother, and more narrowed forwards, the 
embolium less dilated, the posterior angles of the connexival segments less produced. 
Our figure is taken from one of the types belonging to the Stockholm Museum. 
8. Ambrysus hybridus. (Tab. XXI. fig. 9, ¢.) 
Ambrysus hybrida, Mout. Verh. zool.-bot. Ges. Wien, 1897, pp. 18, 22°. 
Hab. Mexico (Mus. Vind. Ces. & coll. Montandon'), Jalapa (Hége). 
The type of this species belonging to the Vienna Museum is a male, and we possess 
a female agreeing with it. The posterior angles of the connexival segments are acute 
and slightly produced (the fifth being rather prominent) in the male, and pointed in 
the female. In the nearly-allied A. guttatipennis the angles are more acuminate. 
Notwithstanding the difference in colonr (the greenish tint usually changing to brown 
after death), it is not improbable that Say’s unidentified Naucoris profunda = 
A. hybridus, Mont.: Bennett collected between Vera Cruz and Jalapa, whence Hoge 
has sent us a specimen of A. hybridus. . 
9. Ambrysus guttatipennis. (Tab. XXI. fig. 10, 2.) 
Ambrysus guttatipennis, Stal, Enum. Hemipt. v. p..143'; Mont. Verh. zool.-bot. Ges. Wien, 1897, 
pp. 13, 227. 
Hab. Mexico (Mus. Holm.'?). 
This is the largest of the Central-American species of the genus, and easily distin- 
guishable by the two flavous spots on the corium—one at the middle of the apical 
margin, the other opposite the inner apical angle of the embolium,—the embolium 
being, as usual, flavous to near the apex. ‘The type, a female, is figured. 
