COLLECTED IN DUTCH NEW GUINEA. 309 
14. MEGYMENUM DENTATUM. 
Megymenum dentatum Boisd. Voy. Astrol., Ins, ii. p. 632, pl. i. fig. 11 (1835). 
Utakwa River Expedition. 
FOLENGUS, gen. nov. 
Body longer than broad, slightly convex, thickly and minutely punctate; head 
about as long as breadth between eyes, which are distinctly substylately produced, an 
obscure tuberculous spine on each side in front of eyes; central lobe slightly projecting 
beyond the lateral lobes, apices of lateral lobes rounded; antenne four-jointed, first 
joint thickened and about reaching apex of head, second thickened, compressed, 
obscurely sulcate, and considerably the longest, third and fourth shorter, subequal in 
length, but each longer than first ; rostrum passing the posterior coxe; pronotum 
broader than long, anterior and posterior margins subtruncate, the lateral margins 
oblique and moderately sinuate ; scutellum not passing the middle of abdomen, about 
as long as broad at base, apex rounded; abdomen beneath moderately centrally 
longitudinally sulcately impressed on basal half, spiracles on the basal ventral segment 
exposed, not hidden by the metasternum, and placed on the segmental margin ; legs 
moderately stout, femora with a rudimentary tuberculous spine beneath at apex; tarsi 
two-jointed ; membrane almost reaching abdominal apex, about as long as corium, 
with five longitudinal veins becoming much ramified at a short distance from base. 
I place this genus near Thalma Wall., from which it differs in the different position 
of the lobes of the head, the porrect eyes and the short tuberculous spine in front of 
them, longer rostrum, ete. 
15. FoLENGUS PAPUENSIS, sp. n. (Pl. XXXIV. fig. 17, 17 a.) 
Black, thickly finely punctate ; apical joint of antenne (excluding base) brownish 
ochraceous ; basal margin of head almost impunctate ; scuteilum slightly transversely 
wrinkled on basal half; connexivum exposed from about middle of corium and finely 
granulate ; membrane somewhat piceous towards apex ; other structural characters as 
in generic diagnosis. 
Long. 15 mm. Max. breadth 95 mm. 
Utakwa River Expedition. 
Family CornID&. 
Subfamily Coreinz. 
Genus PTERNISTRIA. 
Pternistria Stal, Enum. Hem. iii. p. 43 (1873). 
Found in the Papuan and Australasian regions. 
