138 HEMIPTERA-HOMOPTERA. 
and are furnished with closely-set parallel veins on the overlapping and overlapped portions at the apex ; 
legs long, the tibie with five spines, the last of which is situated just before the base, those at the 
apex of the posterior pair strong. 
The type of the genus, ft. delineata, Walk., is from Sarawak, but it closely resembles 
the species described below ; the peculiar female organs are much the same, but those 
of the male are considerably different. 
1. Rhotala ambigua, sp.n. (Tab. XIII. figg. 19, 194, 6, 3; 20, 20a, 2.) 
Oblonga, subparallela, brunnea vel fusco-brunnea, partibus anticis plus minusve testaceis; capite angusto, 
vertice ante oculos producto, rotundato; capite pronoto tegulisque magnis testaceis ; pronoto perdistincte 
tricarinato; scutello fusco-nigro, utrinque carinato, carina centrali peene deficiente, disco subrugoso ; 
tegminibus brunneis unicoloribus vel perobscure colore obscuriori variegatis; alis fuscis; pedibus 
plerumque testaceis. 
Mas minor, segmento ultimo ventrali leviter emarginato; stylis robustis, ad medium contractis, apicibus 
subtruncatis. 
Femina major, segmento ultimo ventrali fere recto, deinde lamina magna subtriangulari partibus genitalibus 
subjacente. 
Oblong, subparallel, brown or fuscous-brown, with the anterior parts more or less testaceous ; head narrow, 
the vertex produced before the eyes, with the anterior margin and the eyes rounded; pronotum and 
tegule testaceous, the pronotum with three strong carine, the side ones meeting semicircularly in front ; 
scutellum scarcely longer than the pronotum, with a carina on edch side and the central keel absent or 
only just traceable; tegmina testaceous-brown, unicolorous, or very obscurely mottled with darker (aud 
occasionally lighter) colour, the venation very distinct ; wings infuscate; legs mostly testaceous. 
Male smaller, with the last ventral segment gently emarginate in a segment of a circle, and with two robust 
straight styles, separate and broader towards the base, and narrower and approximate towards the apex, 
contracted in the middle and with the ends subtruncate. 
Female larger, with the genital organs covered below by a large plate, which is somewhat triangular in shape, 
and is broadly emarginate on each side; the organs themselves are very complicated, consisting of two 
narrow plates enclosing two slender plates or processes, and on each side of these below are two other 
narrow plates terminating in short, sharp, seta-like processes; anal process or tube broad, anal style very 
short and hidden in the orifice by short whitish sete. 
Long. cum tegm. 10-12 millim.; lat. ad hum. 4-43 millim. (¢ 9.) 
Hab. Panama, Volcan de Chiriqui 2000 to 4000 feet (Champion). 
One male and seven females. The characters of the female, if I am correct, are 
very extraordinary, and require further examination in the case of fresh specimens ; 
but for the fact that there is a single example of the other sex, I should unhesitatingly 
have considered them to be all males, as the characters, which are unlike any I have 
observed among the Homoptera, are much more like those of the male than of the 
female. ‘The specimens all belong to one species, and appear to have been taken at 
the same time. 
SYNTAMES, gen. nov. 
Elongata, parallela, vertice rectangulari vel subrectangulari, latitudine paullo longiori, ante oculos distincte 
producto; oculis fortiter emarginatis; fronte angusta, latitudine fere triplo longiori, marginibus et carina 
media hujus et clypei distinctis, clypeo et rostro longis; pronoto brevi, ad latera ampliori; scutello 
magno, convexo, fere brevi, postice depresso; tegminibus longis, ad latera adpressis, venis radiali et 
ulnaribus in unum ante basim conjunctis, vend radiali et ulnari interiori fere ad medium, vend ulnari 
exteriori pone medium furcatis ; tibiis posticis simplicibus. 
