162 LIST OF HOMOPTEROUS INSEOTS.. 
CENTROTUS ASPERULUS. 
Niger, validus, obscurus, subpubescens, subpunctatus, inermis ; 
cornu posticum altenuatum, acutum; abdomen cornu posti- 
cum superans; pedes picei; ale antice nigricantes, fascia 
subapicali vitrea. 
Black, stout. Prothorax dull, slightly pubescent, very minutely 
punctured, not dilated on each side, attenuated hindward to 
the acute tip, which does not extend to the tip of the abdomen. 
Legs piceous. Fore wings blackish, with a vitreous transverse line 
by the tip of each. Length of the body 12 line; of the wings 
2 lines. 
a. Sierra Leone. Presented by the Rev. D. F. Morgan. 
CENTROTUS VARIUS. 
Niger, subpunctatus ; caput inter oculos excavatum ; prothorax 
carinatus, antice inermis, humeris sat acutis ; cornu posticum 
gracile, acutum, undulatum, apud medium testaceum, abdomen 
non superans ; pedes picei, genubus tibiis apice tarsisque ful- 
vis ; ale antice basi punctate, lituris variis posticis plagaque 
costali subapicali vitreis. 
This species differs much from the typical form of Centrotus, 
and may form a new genus. Black, minutely punctured. Head 
somewhat excavated between the eyes. Prothorax keeled, unarmed 
on each side, with a smooth shining spot on each side in front; 
shoulders somewhat acute; hind horn slender, acute, undulating, 
testaceous in the middle, not extending beyond the tip of the abdo- 
men. Legs piceous; knees, tarsi and tips of the tibie tawny. 
Fore wings punctured towards the base, with various vitreous marks 
hindward and with a large vitreous patch near the tip of the costa. 
Length of the body 2 lives; of the wings 4 lines. 
a. Birmah. From Mr. Waring’s collection. 
CENTROTUS OBSTANS. 
Niger, validus ; prothorax rude punctatus, antice vix carinatus, 
cornubus lateralibus abbreviatis, conicis acutis planis, guttis 
duabus pectorisque lateribus testaceo tomentosis ; cornu posticum 
altenuaium, carinatum, subarcuatum, apice acutum, abdomen 
vie superans ; tibia tursique ferruginea ; ale cinereo-vilree, 
venis Sronapinell 3 antice basi picee et punctate. 
