MEMBRA Cl DJE. 
142 
HETERONOTUS INERMIS. 
(Plate XXX. figs. 3, 3a.) 
Lap. l.c. p. 97, PI. III. fig. 10. II. signatus. Burm. l.c. p. 130, and p. 228. Combophora reticulata, 
Burm. l.c. 
This insect has some resemblance to II. bid net a, but the form of the pronotum 
separates it. The ventral spine rises almost from the second instead of the third 
lobe of the pronotum, and the apex is much less developed ; the suprahumeral horns 
are smaller also, and the dorsal ridge is nearly straight; general colour ochreous, with 
pale white streaks above the tegmina. These differences do not appear to be sexual. 
Size, 12 x 5 mm. 
Habitat. —Rio Janeiro. 
From the B.M. Collection. 
HETERONOTUS NIGRICANS. 
(Plate XXX. figs. 4, 4a.) 
Lap. l.c. p. 96, PI. III. fig. 8 (1832). Fairm. l.c. p. 500 (1846). 
Large. A remarkable insect and like the last described, mimicking a large, black 
winged ant; of the three nodes, the posterior is the largest; black, or brownish black, 
much pitted or sculptured ; shining when seen in a strong light. The appearance is 
somewhat like II. glanduliger , which some authors have thought might prove to be 
the male, but Fairmaire doubts this to be a fact. The posterior lobe is furnished 
with a strong ventral spine; the tegmina are transparent fuscous, with richer brown 
on the costa and the marginal borders ; a sinuous line on each side occupies the first 
and second nodule of the pronotum; the tegmina are much shorter than the 
pronotum ; the abdomen greenish, and shorter than the pronotum ; the last lobe is 
easily broken oft' from the peduncle of dry specimens ; the insect then has much 
resemblance to a hunting spider ; two short horns project above the suprahumerals ; 
some examples are browner than others. 
Size, 13 x 4 mm. 
Habitat. —Brazil. 
Wollaston Collection. 
HETERONOTUS GLANDULIGER. 
(Plate XXX. fig. 5.) 
Ranatra glanduligera, Less. Ill. Zool., PI. LVII. fig. 2. 
Colour port-wine brown, sometimes more ochraceous; pronotum trilobed, the 
posterior node the largest; globose, inflated, with a small ventral spine which is 
white at the tip ; the anterior lobe with two white marginal streaks ; the second lobe 
