30 



times curled forward, a "post-antennal chamber." The short- 

 ness of the pronotum is oftimes more apparent than real, on ac- 



benl in fh '' '-Tl "'" ^Tl'^'V^'''''''''^- "^^^^>^ Perpendicular, being 

 bent n the middle and fitted mto the emargination of the vertex 

 The absence or presence of carinae on pronotum or scutellum' 

 IS a very uncertam character, as many small light-colored spec es 

 appear to have cannae on account of the three dark longitudina 

 marks, mdicatmg the attachment of the thoracic muscles. 



For specific distinction it is necessary to compare the o-gnital 

 armature m certan. groups. The present study Ihows tlaf verv 

 few species have a wide distribution among the Malay Islands 



gemtaTif " °' ''' ''''''' ''' ^^'^^"^^ ^^' -P^^^^ ^^tt^t 

 The family can be divided into four groups: 



1. Tegmina exceptionally long and narrow, wings less than half 



the length of tegmina, sometimes very minute. .Group III 



legmina not long and narrow, wings more than half the 



length of tegmina 5 



2. Cubital veins not reaching to hind margin of tegmen but 



ending in the extended claval vein; third claval cell open 

 extending along hind margin to last apical median cell. . 



r- TT 



Cubital veins ending in hind niargin" of'tegmen; 'thirTdaval 

 cell closed, not extending to last apical median cell 3 



3. Cubitus simple or furcate, not running into first median 



^Cv^ Lor ^_ ^^--t -|- 



Cubitus with three or more branciiei' '(or' 'the' cubitus" con- 

 nected with the first median sector, forming an angular 

 or diamond-shape cell ) '^'^ _ Group IV 



_ The first, or Ceuchrca, group is a natural one, and the forms 

 included in it are closely allied; in many of the genera the sys- 

 tems of neuration are all separated from the base of the tegmina 

 such forms being the most generalized of the Dcrbidac >haci- 

 occphalus miltodras and P. pnUatns are of interest as show 



mo- 



the commencenient of the modification which distinguishes o-roup 

 two namely, the opening of the third claval cell and the failure 



I f 22.'pf nr/^iV) '''^^ ""^"^ '^'' P°''''^°'' '""^■^■^"- ^^^ 



nn J'fnir'°"'^' ?" ?,^''T"'' -'°"P ^-^ ^'-^o a homogeneous one 

 most fant.stically shaped insects of the family, such as Swcccyia 



