» CATALOGUE OF 
F. Rostrum reposing in a groove. - - 6. DuctirostRa. 
G. Rostrum free, without a groove. - - 7. NuprRosTRa. 
H. Head triangular, received up to the eyes by 
the prothorax. Four hinder legs formed 
for rowing or for gliding on the water. 
Ungues of the tarsi hidden in a notch of 
the last joint before its tip. - - - 8. REMIPEDA. 
2. SUPERICORNIA, C. H. 369. 
. Head quadrate. - - - - - 1. TETRAGONOCEPHALA. 
. Head triangular. - - = - = 2. TrRIGONOCEPHALA. 
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1. TETRAGONOCEPHALA. 
Tetragonocephala, Serv. Hist. Hem. 184. 
A. No spine near the base of the antenne. 
a. Antenniferous tubercles very prominent, 
separated by a notch, without a groove or 
a keel between them. - - - - 1. SECTIFRONTIA. 
b. Antenniferous tubercles less prominent, with 
no notch, but with a keel between them. 2. PLENIFRONTIA. 
B. Head with a spine at the base of the 
antenne, or with the first joint of the 
antenne spinose. See - 3. SPINIFRONTIA. 
1. SECTIFRONTIA. 
Sectifrontia, Serv. Hist. Hem. 184. 
A. Femora smooth; hind femora not thicker 
than the others. - - - = 1. SPARTOCORIDA. 
B. Femora with spines beneath; hind femora 
thicker than the others, especially in the 
male. - - - - - 2. Micripz. 
Fam. 1. SPARTOCORIDA, C. H. 370. 
Fam. Coreida. Subfam. Coreida. Div. Spartocorida, Stal. 
A. Antenne cylindrical. 
a. Prothorax crescent-shaped. 
* Body elongate. Abdomen not dilated.  - 1. EuvaGona, 
** Body ovate, Abdomen dilated. - - 5. MENENOTUS. 
b. Prothorax not crescent-shaped. 
* 
Fourth joint of the antenne much longer 
than the third. Disk of the prothorax 
with tubercles. = - - - . - 2. SEPHINA. 
** Fourth joint of the antenna a little longer 
or shorter than the third. 
+ Hind angles of the prothorax rounded. — - 3. SPARTOCERA. 
++ Hind angles of the prothorax acute. - 4. EvBu_e. 
