92 HEMIPTERA-HOMOPTERA. 
is extremely narrow and not produced in front; the tegmina are transparent and shining, with testaceous 
veins, and very indistinct granulations, which are set wider apart than in other species of the genus; 
abdomen reddish-brown or partly black ; legs testaceous. 
Male with the last abdominal segment slightly produced and angled at the sides, the apical plate being sinuate 
and somewhat sharply produced in the centre. 
Long. cum tegm. 4-5 millim.; lat. ad hum. 1-13 millim. (¢ 9.) 
Hab, Guatemata, Volcan de Chiriqui (Champion). 
In our collection there are also several single specimens belonging to this genus, 
from Cuernavaca, Chilpancingo, San Isidro, Rio Naranjo, and Caldera, but they can 
hardly be described without more material. 
OLIARUS. 
Olarus, Stal, Berl. ent. Zeitschy. vi. p. 306 (1862). 
In this genus the vertex is a little longer than broad, subquadrate, or transverse, and 
is angularly notched behind; the frons and clypeus taken together are broadest about 
the middle, and have the central carina distinct. In the typical species the scutellum 
has five complete and distinct carine, the frontal ocellus is very distinct, and the frontal 
carina just at the vertex is minutely forked or thickened, so as to form a small triangle 
with the margin of the vertex as its base. These characters, however, are variable, and 
the genus appears to merge into [Hyalesthes. It is also very closely allied to Cixius. 
1. Oliarus excelsus, sp.n. (Tab. X. figg. 14, 14 a) 
Niger, sat robustus, vertice subquadrato, postice latiori, fronte cariné media marginibusque testaceis ; pronoto 
nigro, testaceo anguste marginato; scutello magno; tegminibus vitreis, fusco indistincte vittatis, venis 
fuscatis, granulatis; alis ad apicem fuscatis; abdominis segmentis anguste testaceo marginatis; pedibus 
testaceis, : 
Rather a robust species, black, with the margins of the frons, pronotum, and scutellum, and of the segments 
of the abdomen, narrowly testaceous; vertex subquadrate, slightly narrowed in front; scutellum large ; 
tegmina with more or less distinct fuscous vitte or spots, and similarly-coloured veins, the latter granulate 
and furnished with scanty hairs, the transverse veins before the apex appearing thickened with fuscous 
colour ; legs testaceous. 
Long. cum tegm. 6-7 millim.; lat. ad hum. 2 millim. ( 9.) 
Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 
Two specimens. There is an imperfect male of an Oliarus in our collection from 
Cuernavaca in Morelos, which may belong to this species. 
2. Oliarus concinnulus, sp. n. (Tab. X. figg. 15, 15a, 3, 3.) 
Parvus, concinnus, parallelus, vertice latitudine longiori nigro testaceo marginato; oculis sat magnis, dilutis, 
infra leviter emarginatis; pronoto brevissimo; scutello nigro vel fusco, quinque-carinato; tegminibus 
pellucidis, venis testaceis, ad apicem fuscis, plus minusve distincte granulatis ; abdomine plerumque nigro ; 
pedibus testaceis, ad partem fuscatis. 
Mas segmento ultimo ventrali profunde emarginato, basi emarginationis truncata, in medio producto ; stylis 
permagnis ad apicem fortiter rotunde dilatatis. 
