The Male Genital Armature of the Dcrmaptera. 441 



gidium, are seen also in the PlatylaMinie and the genus Gonolabina 

 respectively. 



Table of Sub-families.* 



1. Body not strongly flattened. 



2. Prosternum narrowed posteriorly ; meta- 

 parameres short and broad ; virga dilated ; 

 manubrium triangular ; squamopygidium as 

 in Gonolabina ; virga inflated, and with 

 spiral structure ..... 



2, 2. Prosternum not narrowed posteriorly ; (squa- 

 mopygidium never formed). 



3. Manubrium very long, narrow at base, 

 dilated at apex ; virga, when present, 

 simple ; metaparameres lanceolate or 

 dilated ...... 



3, 3. Manubrium short, never more than 

 twice as long as broad, and never 

 dilated at the apex. 



4. Antennae with 25-35 segments ; 

 prosternum constricted pos- 

 teriorly; meso- andmetasterna 

 as broad as long ; virga ser- 

 pentine, with vesicle and spiral 

 structure ; manubrium rect- 

 angular ; pygidium quite six 

 times as long as metapygidium 

 4, 4. Antennae with 10-15 segments ; 

 prosternum nearly parallel- 

 sided ; meso- and metasterna 

 transverse ; pygidium only 

 about twice as long as meta- 

 pygidium. 



5. Postfrontal and median 

 sutures of head very 

 distinct, prefrontal ab- 

 sent ; virga with vesicle 

 and spiral armature . 

 Postfrontal and median 

 sutures obsolete, pre- 

 frontal distinct ; virga 

 not inflated, and no 

 spiral armature 

 1,1. Body strongly flattened. 



5, 5. 



1. Esphalmenin^e. 



2. PsalinjE. 



3. LABIDURIN.E. 



2. No squamopygidium formed 

 2, 2. Squamopygidium in both sexes 



4. Parisolabinje. 



5. Brachylabin^e. 



6. PlatylabiinjE. 



7. ApachyiNjE. 



* The Landicinx were included after the above table was drafted ; circum- 

 stances have prevented the modification necessary to admit this new sub-famiiv, 

 but it is so well characterized that it can be at once discriminated. 



