110 HEMIPTERA-HOMOPTERA. 
different genus, but in the shape of the head and in the venation it nearly agrees with 
Plectoderes, from which it differs in the broader and-rather short forehead, without 
central carina. 
5. Plectoderes notatus, sp.n. (Tab. XI. figg. 23, 23 a.) 
Griseo-albescens; vertice brevi ante oculos paullo producto, fronte’ prelonga, subparallela; oculis magnis, 
prominulis, nigris; pronoto scutelloque fortiter tricarinatis ; tegminibus albidis, nigro et fusco-notatis, 
venis subtilibus sed distinctis ; pedibus testaceis. 
Of a greyish-white colour, with the vertex short, slightly produced before the eyes, and a little narrowed in 
front, rectangular; eyes large and prominent; forehead long, subparallel, dilated slightly towards the 
apex, distinctly carinate; pronotum about as long as the vertex, with very strong raised carine, which 
are continued on the scutellum ; tegmina with black and brownish irregular markings, the most distinct 
being situated just before and behind the middle, touching the margins, the veins very fine but distinct ; 
legs greyish-white. 
Female with the apex of the last ventral segment sinuate at the sides and strongly emarginate in the middle, 
the sides of the emargination being produced at their apex into a strong denticulate angle. 
Long. cum tegm. 7 millim.; lat. ad hum. 2 millim. (9.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
One female specimen. 
6. Plectoderes montanus, sp.n. (Tab. XI. figg. 24, 24a.) 
Robustus, sat latus; vertice perbrevi, nigro, carinato; oculis subtus leviter emarginatis; fronte lata, albida, 
clypeo nigro; pronoto nigro, testaceo-lineato; scutello nigro, tricarinato ; tegminibus pellucidis, fusco- 
notatis, parte apicali (apice ipso excepto) fuscaté; alis pellucidis, fusco-apicatis; abdomine supra rufo- 
flavo, subtus nigro-piceo ; pedibus testaceis, plus minusve piceis. 
Mas se&mento ultimo ventrali ad medium profunde impresso, carina magna in processu triangulari continuata 
instructo, lateribus segmenti sinuatis ; stylis brevibus, apicibus dilatatis. 
Rather broad and robust, with the vertex very short, forming with the anterior border of the eyes an arc of a 
circle, the eyes slightly emarginate beneath ; frons broad, white; clypeus deep black; pronotum black, 
with testaceous lines ; scutellum black, tricarinate ; tegmina transparent, with the outer and inner margins 
marked with fuscous spots, and with a testaceous patch on the outer margin before the apical third or 
fourth, which is piceous, with the exception of the apex itself, the latter being transparent, the veins 
fine, but distinct; wings transparent, fuscous at the apex; abdomen orange above and dark below, or 
more or less pitchy. | 
Male with the last ventral segment sinuate at the sides, deeply impressed in the middle and produced, with a 
strong keel running down the depression ; styles short, much dilated at the apex. 
Long. cum tegm. 7 millim.; lat. ad hum. 2 millim. 
Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9500 feet (ZH. H. Smith). 
7. Plectoderes asper, sp.n. (Tab. XI. figg. 25, 25a.) 
Brevis, sat latus, robustus, venis tegminum crassis, elevatis; vertice perbrevi, testaceo, ante oculos haud 
producto, cum oculis latitudinem pronoti equante; fronte sat lata, leviter carinata, testaced, clypeo ad 
apicem fusco; pronoto scutelloque testaceis, hoc distincte tricarinato; tegminibus brunneis ad basim 
anguste testaceis, macula parva rufescenti ad marginem utrinque ante apicem instructis; abdomine 
pedibusque testaceis vel ad partem fusco-testaceis. 
A small, short, broad species, with the outstanding veins and rough appearance of Helicoptera sobrina ; vertex 
yery short, not produced before the eyes, about as broad taken with the eyes (which are prominent) as 
