74 HEMIPTERA-HETEROPTERA. 
often darker. The tibie are more or less distinctly biannulate. A male from Bugaba 
is figured. H. acuwminatus (Fabr.) is also a very closely allied form *. 
2. Hesus flaviventris. (Tab. V. fig. 13, ¢.) 
Dysodius flaviventris, Burm. Handb. der Ent. ii. p. 255 (1835)’; Herr.-Schaff. Wanz. Ins. ix. 
p. 140, t. 312. fig. 957 (2) % 
Hesus flaviventris, Stal, Enum. Hemipt. iii. p. 142°. 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion: 3 2 ).—CoLomBiA, Bogota 3; 
Brazit! 2, Rio Janeiro 3, 
Var. subarmatus. (Tab. V. fig. 14, 2.) 
Hesus subarmatus, Stal, loc. cit. p. 142 (¢) *. 
Hab. Mexico, Atoyac in Vera Cruz(Schumann: ¢ ), Teapain Tabasco (H. H. Smith); 
British Honpuras, Belize (Blancaneaur; Mus. Brit.); GuateMata, Senahu, Tamahu, 
La Tinta, and Teleman in Vera Paz (Champion: 3 2); Panama (Boucard: 3 2 ).— 
Guiana, Surinam 4. 
Not uncommon on the Atlantic slope of Guatemala. In the variety subarmatus 
the anterior portion of the pronotum is armed with a small tubercle on each side and 
has another small tubercle at the anterior angles; it also has the tubercles and ruge 
between the inner callosities less prominent, and the outer callosities less raised. The 
abdomen of the male is shaped as in H. cordatus; the connexivum is more or less 
spotted with ochracecus, and the ventral surface, the apex excepted, is usually of the 
same colour. A specimen (d) from Bogota, determined by Stal as H. flaviventris, 
and the type (2°) of H. subarmatus have been communicated by Dr. Aurivillius. 
We figure two specimens agreeing with these: a male of the typical form from 
Bugaba, and a female of the var. subarmatus from La Tinta. 
HELENUS. 
Helenus, Buchanan White, Journ. Linn. Soc., Zool. xiv. p. 485 (1879). 
The single species referred to this genus, P. hesiformis, Buch. White, from the 
Amazons, chiefly differs from Hesus in the shaggy pubescence of the body, antenne, 
and legs, the more irregular anastomosing neuration of the membrane, the short apical 
joint of the antenne, and the sulcate sternum and venter. In the second species now 
added the sternum is scarcely more deeply sulcate than in Hesus, this insect having 
the head much smaller than in that genus, with a short apical process. 
* In the British Museum there is an immature male specimen of a Hesus from Pard nearly agreeing with 
Stl’s description of H. acuminatus. It has the fifth connexival segment more dilated at the apical angles than 
in H. cordatus (¢), and the abdomen itself broader behind, the pronotum with two ruge between the two 
median callosities. 
