232 HEMIPTERA-HOMOPTERA. 
traceable, forms a very good method for roughly distinguishing the species; but in 
some cases it is very obscure. The characters of the sexes appear to be fairly constant, 
the last abdominal segment of the female being squarely and more or less deeply 
emarginate, with the side-lobes longer or shorter in proportion: in two female specimens, 
however, before me, from the same locality, one has the segment broadly emarginate 
in almost a crescent, and the other has it narrowly and squarely emarginate. The 
examples differ very much in size, and also in the size and shape of the head, which in 
some cases is very large as compared with that of the ordinary type-form ; this is 
particularly noticeable in a series from Chontales, Nicaragua. The colour also varies 
considerably, the tegmina being green, reddish, or fuscous, and the head and pronotum 
being also variable in this respect. 
The types of Proconia badia, P. scutellata, and P. plagiata », Walk., were from 
unknown localities; and Fabricius > ® merely gives “ America” for his Cicada orbona. 
We figure two specimens—one from Atoyac and one from Chontales. 
11. Oncometopia munda, sp. n. (Tab. XIV. fig. 21.) 
Preecedenti affinis, capite pronotoque lete flavis, nigro leviter notatis, illo brevi, hoc leviter rugoso; scutello 
flavo, nigro-notato; tegminibus fusco-rufis, venis exterioribus et ad basim flavescentibus, apicibus late 
hyalinis; abdomine supra nigro ; corpore subtus cum pedibus dilute flavescentibus. 
Femina segmento ventrali ultimo haud emarginato. 
Allied to O. undata, from which it differs in the colouring and pattern of the pronotum, and especially in the 
shape of the last ventral segment of the female; front parts yellow, marked regularly with narrow black 
lines, two of which form a broad and widened inverted V on the pronotum; tegmina fuscous, reddish, 
or tawny brown, with a rather broad hyaline tip; abdomen above black; underside and legs yellow or 
light testaceous. 
Female with the last ventral segment cut straight across and not emarginate, the central portion of its apex 
being very slightly produced, darker, and shiny. 
Long. 11 millim.; lat. ad hum. 3 millim. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
12. Oncometopia alpha, sp.n. (Tab. XIV. fig. 22.) 
Preecedenti affinis, sed paullo magis elongata; capite pronotoque flavis, illo vertica brevi, rotundato, litteré A 
distincte notato ; metopidio nigro-lineato, hoc lineis duabus transversis nigris ad medium coalescentibus, 
vix antice impresso, leviter rugoso; scutello flavo, nigro-notato; tegminibus rubro-violaceis, lineis 
quibusdam angustis nigris, apicibus hyalinis ; corpore subtus pedibusque flavo-testaceis. 
Allied to the preceding (O. munda), but somewhat more elongate; head with the vertex short, rounded, and 
with a distinct black A-shaped mark; metopidium with three lines in front meeting in a large irregular 
black patch behind ; pronotum scarcely impressed in front, slightly rugose, with two transverse black lines 
crossing and coalescing in the centre; scutellum yellow, marked with black ; tegmina of a reddish-purple 
colour, with narrow black lines, the most conspicuous being a wavy line behind the middle, crossing both 
tegmina, and another bounding the whole hyaline apex, a narrow hyaline border being left on its upper- 
side; abdomen dark above; underside and legs yellow-testaceous. ' 
Long. 12 millim.; lat. ad hum. 3 millim. 
Hab, Mexico, Ciudad in Durango 8100 feet (Forrer). 
