10 



THE ENTOMOLOGIST S^RECORD. 



1. Dekicokystes, Serv. 



2. Platyphyma, Fisch. 



Fain. 5 : Acridiid^. 

 This family includes a very large number of genera distributed 

 throughout the world ; only a small portion being found in Europe. 

 It is characterised by the not elongated vertex (in European forms), 

 which passes without angle into the frons ; the elytra has no 

 intercalate vein in the discoidal area ; an important character is the 

 presence of a distinct spine, sometimes very long, on the prosternum. 



Table of Genera. 

 1. Posterior tibise cylindrical ; mesosternal lobes sepa- 

 rated from each other. 



2. Posterior tibias with an apical spine on the outer 

 border. 

 3. Frons vertical; pronotum swollen anteriorly; 

 prosternal tubercle spiniform; elytra and 

 wings well developed . . 

 3.3. Frons oblique; pronotum not swollen, obtusely 

 tcetiform ; prosternal spine transverse and 

 wedged-shaped ; elytra squamiform 

 2.2. Posterior tibiae with no apical spine. 

 3. Pronotum without lateral carinas. 



4. Posterior border of pronotum angled ; wings 

 and elytra well developed, longer than 

 abdomen ; very large. 

 5. Pronotum tectiform ; cerci i conical ; 

 infraanal plate <? strongly tridentate (in 

 the European species) 

 5.5. Pronotum depressed; cerci i short, broad, 

 depressed 

 4.4. Posterior border of pronotum round or 

 nearly truncate ; wings and elytra absent 

 or squamiform 

 3.3. Pronotum with lateral carinas more or less 

 distinct, at least in the prozona. 

 4. Frons nearly vertical, especially in 2s; 

 posterior femora short and broad, in ? s 

 2^ times as long as pronotum ; anal seg- 

 ment of 3 very large, the cerci as long as 

 the pronotum (in the European species). 

 5. Elytra and wings well developed; pro- 

 notum obtuse, angled behind . . 

 5.5. Elytra lobiform ; pronotum truncate 

 behind . . 

 4.4. Frons oblique ; femora posterior slender, 

 more than three times as long as pro- 

 notum in ? ; anal segment <? normal, 

 small ; cerci small. 

 5. Posterior tibiae with 15 spines on outer 



border 

 5.5. Posterior tibias with 8-12 spines on outer 

 border . . 

 1.1. Posterior tibiae flattened above; mesosternal lobes 

 united to form a longitudinal suture. (Body and 

 especially pronotum cylindrical.) . . 



Genus I: Dericorystes, Serville. 

 Characterised by the form of the pronotum elevated and gibbous 

 in the prozona. A single European species. 



1. Dericorystes millieri, Finot. 

 Greyish in colour ; of graceful build ; wings tinted with rose ; the 

 elytra and wings well developed ; in the var. carthagonovae, Bol., the 

 elytra do not generally surpass the posterior femora ; the rosy colour 



3. AcRiDiUM, Geoffr. 



4. Schistocesca, Stal. 



5. PoDiSMA, Latr. 



6. Caloptenus, Serv. 



7. Paracaloptenus, BoL 



8. THisoiOETRUs.Brunner, 



9. EuPREPocNEMis, Ficb, 



10. Tropidopola, stal. 



