METRANIELLA. 468 
trough-like rostral canal being formed very much as in the female of 7. wniformis ; 
but in general appearance the insect is more like Acailes and its allies, the metasternal 
episterna, too, are covered by the elytra and the tarsal claws are minute. 
1. Metraniella nigrolineata, sp.n. (Tab. XXII. figg. 25, 25a, °.) 
Short ovate, convex, shining, piceous, the rostrum and antenne obscure ferruginous; densely squamose, the 
scales coarse, brown, ochreous on the flanks of the prothorax; the elytra with an ochreous stripe 
extending down the suture for a short distance and then curving outwards and nearly meeting a 
similarly-coloured oblique curved line running down from the shoulders across the disc, the pale sutural 
stripe followed by a longer velvety-black streak, which is bordered with ochreous scales and limited 
posteriorly by a very narrow ochreous fascia ; the prothorax with two small oval dark brown spots on 
the disc and some other dark markings at the sides and apex ; the prothorax and elytra also with a few 
scattered fascicles of very short suberect scales, these being conspicuous on the second and fourth 
interstices; the legs mottled with lighter and darker brown. Head densely punctate; rostrum 
moderately stout, rugose at the base and almost smooth thence to the tip. Prothorax transverse, 
conical, constricted in front, densely, finely punctate. Elytra subtriangular, short, almost gibbous, the 
humeri rounded ; deeply punctate-striate, the interstices moderately convex, very minutely punctate. 
Beneath densely punctate. Anterior femora sharply dentate, the others almost unarmed. 
Length 23, breadth 1,%, millim. ( 2.) 
Hab. Guatemaa, Zapote (Champion). 
One rather dirty specimen. ‘The velvety-black sutural streak at the middle of the 
elytra is very conspicuous in this insect ; it Just covers the first interstice. 
Sect. CRYPTORRHYNCHIDES. 
Sous-Tribu iv. Cryptorhynchides vrais, Lacordaire. 
Under this section are included all the Cryptorrhynchids with the rostral canal 
abruptly closed behind by the protuberant, deeply excavate mesosternum. ‘The latter 
is usually semicircular or horseshoe-shaped in front, and projects more or less forwards, 
but the excavation sometimes extends as far backwards as the posterior margin of the 
intermediate coxe. The first division, the “ Tylodides,” are connected with the second, 
the “Cryptorhynchides vrais,” by Tylodinus, in which the rather broad metathoracic 
episterna are more or less fused with the metasternum. ‘The only recent paper on 
the Tropical-American members of this group is that of Faust (Stett. ent. Zeit. 1896, 
pp- 35-88) *. I follow Lacordaire in placing most of the apterous forms first, these 
either wanting a scutellum or having the metathoracic episterna so narrow as to be 
covered by the inflexed margins of the elytra. Metadupus, however, is winged, and has 
a large scutellum and sharply defined, exposed episterna: it belongs to his Groupe IL., 
“« Cryptorhynchides vrais,’ and not to the Groupe L., ‘‘Tylodides” ; Ulosomus, too, is 
here referred to the second group. 
* In this paper, “ Reise von E. Simon in Venezuela,” forty species are enumerated, belonging to twenty-two 
genera, eighteen of which are characterized as new. The types of nearly all of them have been kindly lent us 
for examination by Dr. Heller, of the Dresden Museum. 
