456 CATALOGUE OF 
angle on each side. Scutellum attenuated, acute, luteous at the tip and 
with a luteous callus on each basal angle. Pectus, under side of abdomen 
and femora minutely speckled with black. Sternal keel slightly grooved, 
extending from the hind coxe to the fore cox, notched for the reception 
of the tip of the ventral spine. Legs tawny. Fore wings very thickly and 
minutely punctured; membrane xneous-cinereous. Length of the body 
6 lines. 
This and the two following species differ somewhat in structure from 
the typical form of the genus. 
a. Amazon Region. From Mr. Bates’ collection. 
9. BRACHYSTETHUS MARGINIFER. 
Piceus ; caput et thorax anticus sordide fulva; caput subtus testaceum ; 
antenne lestacee; thorax flavescente pallido marginatus, angulis 
posticis suboblusis ; pectus et venter nigricantia, disco fulva ; pedes 
fulvi; ale anticé saturatissime virides, costa pallide flavescente, 
membrana aneo-fusca. 
Piceous. Head and fore part of the thorax dingy tawny. Head 
thickly and minutely punctured, testaceous beneath. Eyes reddish. 
Rostrum and antenne testaceous. Thorax and scutellum thickly and 
minutely punctured. Thorax with a smooth incomplete somewhat tumid 
band near the fore border; a pale yellowish rim along each side; hind 
angles slightly obtuse, not prominent; hind border straight, rounded on 
each side. Scutellum elongate-triangular, slightly acute. Pectus and 
under side of the abdomen tawny in the disk, blackish on each side. 
Sternal keel like that of B. biguttatus. Legs tawny. Fore wings very 
dark green, very thickly and minutely punctured; costa pale yellowish ; 
membrane eneous-brown. Length of the body 6 lines. 
a. Amazon Region. From Mr. Bates’ collection. 
10. BrRacHYSTETHUS PICEOLUS. 
Fuscus, subtus luteus, nigro conspersus ; caput et thorax anticus obscure 
viridia; antenne lutescentes, basi nonnunquam picee ; thorax trans- 
verse subrugulosus, flavescente pallido marginatus ; scutellum attenu- 
alum, subacutum ; pedes lutet, femoribus nigro conspersis; ale 
antice costa basi pallide flavescente, membrana eneo-cinerea. 
Brown, luteous beneath. Hind and fore part of the thorax dark 
green. Head thickly and minutely punctured. Eyes piceous. Antenne 
dull Juteous; first joint sometimes piceous; third much longer than the 
second, much shorter than the fourth; fifth as long as the fourth. Thorax 
thickly, minutely and transversely rugulose, with a smooth band in front 
and with a pale yellowish rim on each side; hind angles rounded, not 
prominent; hind border straight, rounded on each side. Scutellum 
attenuated, slightly acute. Pectus, under side of abdomen and femora 
thickly and minutely speckled with black. Sternal keel like that of the 
preceding species. Legs luteous. Fore wings thickly and minutely 
punctured ; costa pale yellowish at the base; membrane eneous-cinereous. 
Length of the body 5—5} lines. 
a,b. Santarem. From Mr. Bates’ collection. 
