ACROLEUCUS. 189 
joint of antenne red. Membrane fuscous, with a very broad pale hyaline margin. Rostrum fuscous, 
long, almost reaching third abdominal segment. 
Long. 11 millim. 
Hab. Costa Rica (Mus. Berol.). 
Apparently allied to A. signoreti, St&l, from which, however, its very different colour 
and markings alone will separate it. 
2. Acroleucus brevicollis. (Tab. XVII. fig. 15.) 
Lygeus brevicollis, Stal, Stett. ent. Zeit. xxiii. p. 311. 2097. 
Acroleucus brevicollis, Stal, En. Hem. iv. p. 115. 9’. 
Hab. Mexico! (Helfer, Mus. Vind. Ces.). 
The type, in the collection of Dr. Signoret, is here figured. 
8. Acroleucus tullus. (Tab. XVII. fig. 16.) 
Lygeus tullus, Stal, Stett. ent. Zeit. xxiii. p. 311. 210°. 
Acroleucus tullus, Stal, En. Hem. iv. p. 115. 10°. 
Hab. Muxico 12, Orizaba (Bilimek, Mus. Vind. Ces.); Guatemata, Senahu, San Juan 
(Champion); Panama, Volcan de Chiriqui, 2000-3000 feet (Champion). | 
This species is very closely allied to the last, but is usually smaller, and, as Stal 
remarks, ‘““cum eodem hemelytrorum margine costali recto insignis.” The posterior 
margin of the pronotum is not luteous as in the preceding species. 
The type, in the collection of Dr. Signoret, is here figured. 
4. Acroleucus vicinalis, n. sp. (Tab. XVIII. fig. 8.) 
Black. Pronotum with the anterior third and a central longitudinal fascia dull red. Scutellum with a pale 
luteous central fascia, which commences at a short distance from base, and is continued along apical 
claval margins. Corium with the lateral and apical margins pale luteous, the former distinctly widened at 
base. Membrane black, apical margin widely pale hyaline. Underside of head black ; prosternum reddish ; 
meso- and metasternum black, with the posterior margins and acetabula dull ochraceous; abdomen pale 
ochraceous, a broad submarginal fascia and apical segment black. Antennz, rostrum, and legs fuscous ; 
trochanters much paler. 
Long. 5 millim. 
Hab. Panama, David (Champion). 
Allied in general appearance to Lygeus vittiscutis, Stal, but smaller, with the pronotum 
more quadrate, and the colour-markings different. 
Division ORSILLARIA. 
Orsillaria, Stal, En. Hem. iv. pp. 98 & 119 (1874). 
Nysiina, Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 304 (1875). 
Nysiine, Uhler, Bull. U.S. Geol. & Geog. Surv. iii. p. 409 (1877). 
This division was founded by Stal on the following characters :—‘Alis decoloribus 
