32 



1. Blatta.— (Blattidas.) 



2. Mantis. — (MantidiE and Phasmidae.) 



3. Gryllus. — (Gryllidse, Locustidse, and Acrididse.) 



The third group, which embraces the three families Grryllidae, Locus- 

 tidse, and Acrididas of the present day, he divides as follows : 



1. Acrida. — Head conical, as long as the thorax ; antennae ensiform. 



(Acrididse in part.) 



2. Bulla. — Thorax carinate ; antennae shorter than the thorax ; tiliform. 



(Acrididae in part.) 



3. Acheta. — Tail with two setae. 



(Gryllidee.) 



4. Tettigonia. — Tail of the female sword-bearing; antennae setaceous. 



(Locustidse.) 



5. Locusta. — Tail simple ; antennte filiform. 



(Acrididse in part.) 



Westwood, in his " Modern Classification of Insects," separates the For- 

 ficulidse from the rest of tiie Orthoptera, and raises it to a distinct order, to 

 which he applies the name Euplexoptera, placing it next the Coleoptera ; the 

 remaining families are arranged in the following descending series : * 



Sec. I. Cui'soria Blattidse. 



Sec. II. Eaptoria Mantidas. 



Sec. III. Ambulatoria. . - - Phasmidae. 



( Achetida3 (Gryllida3).t 



Sec. IV. Saltatoria < Gryllidae (Locustidas). 



V Locustidce (Acrididae). 

 Serville, in his " Histoire des orthoptferes," adopts the following arrange- 

 ment, which, according to Fischer, is ascending : 



r Forficulariae. 



c, T /M • Blattariae. 



Sec. i. Cursona < 



I Mantides. 



[ Phasmidae. 



* Fischer (Orthop. Enrop., 291) evidently alludes to this a-rraugement of Westwood 

 as ascending; but this is certainly a mistake, as he expressly places Orthoptera below 

 Uoleoptera, and connects by Forficulidns (Euplexoptera) Mod. Classf., I, 29. 



t Tjc names in pareutheses are the present equivalents of those opposite, thus : 

 the AchctidiB of Westwood is our Gryllidaj, &c. 



