294 HEMIPTERA-HETEROPTERA. 
S. caudata, but the apex of the abdomen is subtruncate and not produced. In this sex the 
abdomen is long and narrow, subparallel to the apex of the fifth segment and narrowing 
thence to the apex, which is subtruncate. The females have the abdomen widened to the 
apex of the fourth segment and narrowed thence to the apex, the outer apical angles of 
the fourth segment being more or less prominent. The connexival margins are minutely 
denticulate in both sexes. The third spine of the double series on the ante-ocular 
portion of the head is very elongate. The females are only separable from those of — 
S. defecta by this last-mentioned character; but the males of these two species are 
very different. The anterior lobe of the pronotum is set with very short subconical 
tubercles. In our numerous Mexican and Guatemalan specimens the spiniform lateral 
angles of the pronotum are directed a little backwards, while in the long series of both 
sexes from Chiriqui they are directed outwards, but this difference is not constant. A 
male from Teapa is figured. | 
5. Sinea integra. (Tab. XVIII. fig. 11, 2.) 
Sinea integra, Stal, Stett. ent. Zeit. 1862, p. 443 (¢ 2)’; Enum. Hemipt. ii. p. 71%. 
Hab. Mexico (Mus. Holm.1), Presidio de Mazatlan, Milpas in Durango (Forrer), 
Rincon in Guerrero (H. H. Smith), Orizaba (Bilimek, in Mus. Vind. Ces.), Temax in 
N. Yucatan (Gaumer: 3 9). . 
Stal appears to have confused two species under this name, as he gives! “ the 
posterior lobe of the pronotum as unarmed or with scattered spinules on the disc”: 
the specimen (¢) in the Signoret collection named by him belongs to S. undulata. 
The name integra is here retained for the insect with distinct spines on the disc of the 
posterior lobe of the pronotum. It is very like S. undulata and S. diadema, and has 
the head and anterior lobe of the pronotum similarly spinose ; but the posterior lobe 
of the latter is not bigibbous on the disc, and the abdomen of the female is gradually 
widened to the apex of the fourth segment and narrowed thence to the apex (instead 
of being undulate at the sides as in S. undulata). ‘The abdomen is rounded at the 
sides in both sexes, and, as usual, narrower in the male than in the female. Seven 
specimens only have been seen, including one of Stal’s types (¢) belonging to the 
Stockholm Museum. A Yucatan example is figured. 
6. Sinea sanguisuga. (‘l'ab. XVIII. figg. 12, 12a, 3.) 
Sinea sanguisuga, Stal, Stett. ent. Zeit. 1862, p. 444 (2) 1; Enum. Hemipt. ii. p. 71%, 
Hab. Mexico (Mus. Holm.1?; Mus. Vind. Ces.; Sallé), San Lorenzo near Cordova 
(M. Trujillo), Atoyac, Teapa (H. H. Smith); Guatemaia, Cahabon, Chiacam, and 
Teleman in Vera Paz, San Isidro, Cerro Zunil, Volcan de Atitlan, Paso Antonio, 
Zapote (Champion). 
Not uncommon in Mexico and Guatemala, whence we possess forty-five specimens. 
S. sanguisuga agrees with S. defecta in having the abdomen somewhat similarly 
