540 



Transactions of the Society. 



not marked. Possibly this dimorphic form is a throw-back to a 

 more primitive type ; but it will be very interesting to find out 

 which is the dominant form (PI. XI, figs. 15-18). 



Genus Paralabis g. n. 



Genus alatum, brachypterum, vel apterum ; metaparameres 

 medio modice dilatati, apicem versus sensim angustati, apice ipso 

 anguste rotundati ; prseputialis sa^pius denticulata. 



Fully-winged, brachypterous, with rudimentary elytra, or 



apterous ; metaparameres moderately di- 

 lated about the middle, gradually nar- 

 rowed towards the tips, which are narrowly 

 rounded, the external margin regularly 

 convex ; preputial sacks usually with 

 denticulate pads ; no virga discernible. 

 Type. — Paralabis owenii Burr. 

 This o-enus contains a number of hetero- 

 geneous species from different districts, 

 which have a common form of metapara- 

 mere as described. These are P. owenii 

 Burr, from Liberia, an apterous species,, 

 well characterized by the point of the 

 ninth sternite of the male ; P. pervicina 

 Burr, an apterous species from Assam, 

 which superficially resembles Euhorellia 

 annulipes Luc, but is a little larger and 

 brighter in colouring; P. greeni Burr, 

 from Ceylon and Southern India, in which 

 the elytra are rudimentary, but meet 

 along the suture ; and P. dohrni Kir by, a 

 fully- winged Indian and Singalese species, 

 with a superficial resemblance to Landex ; 

 it is characterized by a submetallic deep 

 blue sheen. P. owenii has a well-marked 



Fig. 62. — Paralabis owenii 

 Burr, $ . Genitalia. 



EXPLANATION OF PLATE XII. 



FIG. 

 1. 

 2. 



3. 



4. 

 5. 

 6. 

 7. 

 8. 

 9. 

 10. 



Paralabis dohrni Kirby. 

 P. greeni Burr (black form). 

 P. pervicina Burr. 

 Gelotolabis setliiopica Burr. 

 G. infelix Burr. 

 G. maxima Brulle. 

 Gonolabis oblita Burr. 

 G. electa Burr. 

 Mongolabis ivoodwardi Burr. 

 M. 2)acifica Erichs. 



FIG. 



11. Mongolabis brunneri Dohrn. 



12. Mongolabis (?) sp. (Formosa). 



13. Euborellia janeirensis Dohrn. 



14. E. insulana Bor. 



15. E. cincticollis Gerst. 



16. E. debilis Burr. 



17. E. tellinii Bor. 



18. E. compressa Bor. 



19. E. mcesta Gen<§. 



20. E. andreinii Bor. 



