108 
MEMBRA CIDJE. 
tegmina of nearly all the genera have long parallel-sided areas. These, as well as 
the apical cellules, are never found to be petiolate. 
The genera may he approximately grouped as follows: 
DARNIN JE. 
I. 
TEGMINA NOT MORE THAN HALF AS LONG AGAIN AS THE WINGS. 
( Pronotum covering one half or more of the corinm. 
II. 
1. Aspona. 
2. Darnis. 
3. Hebeticoides. 
4. Tropidarnis. 
5. Stictopelta. 
TEGMINA FREE. 
Pronotum with a porrect frontal horn, but without 
suprahumeral processes. 
Pronotum with suprahumeral processes. 
fi. Aconophora. 
7. Entaphinus. 
8. Alcmeone. 
9. Hyphinoe. 
10. Hemiptycha. 
11. Tomogonia. 
12. Ictaranthe. 
13. Nassunia. 
Pronotum without suprahumeral horn. 
1 
III. 
14. Cymbomorpha. 
15. Dysyncritus. 
1(5. Darnoides. 
17. Scaphula. 
TEGMINA AS LONG AS THE WINGS. 
Pronotum both nodose and spinous. 18. Heteronotus. 
Synoptic tables may appear to be easy to use as drawn on paper, but they are difficult to construct 
in a strictly reliable manner. 
I insert, after Hyphinoe, some species of the modified genus Hemiptycha of Fairmaire. They are 
not included in the Biologia of Central America, the examples occurring chiefly in Brazil. 
Certain preliminary characters may he drawn from the amount to which the alary 
organs are covered by the pronotum. But cabinet specimens are not well suited 
to show this obscuration of the tegmina and wings. 
It is obvious that insects preparing for, or concluding, their short flights, are not 
in a suitable position for showing such characteristic grouping. Nevertheless, I have 
in part adopted Canon Fowler’s synoptic table in the Biologia, which is partly 
founded on the above characters of concealment of the wings. His suggestive hints 
in grouping this difficult section of the family are distinct helps ; but, like him, I 
would state that reference to the diagnosis of a species should be more studied 
