34 MANDIBULATA. ORTHOPTERA. 



A. Thorax with the keel slightly elevatedj the produced hinder portion 



extending beyond the abdomen; wings axa^Ae ; stature narrow. 



Sp. 1. subulatum. Obscure testaceo-fuscum, tibiis pallidis fusco-maculatis, 

 corpore anffustato, prothorace postice productd ultra apicem abdominis. (Long. 

 Corp. 4 — 8 lin.) 



Gryl. subulatus. Linne. — Ac. subulatum. Steph. Catal. 302. No. 3344. — 

 Curtis, V. X. pi. 439. 



Dull testaceous-brown, minutely shagreened; body slender, thorax produced 

 behind beyond the apex of the abdomen, rather abruptly narrowed at the 

 base, and somewhat linear behind ; tibiae pale, spotted with brown ; wings 

 ample. 



Var. /3. Ac. pallescens. Zett. O. S. 109. — Ac. bipunctatum. Panzer, v.f. 18. 

 Tet. Panzeri. ServiUe End. v. x.p. 599. No. 2. — Fuscous, with the base of 

 the antennae, the crown and the back of the thorax, nearly entirely dull 

 ochreous ; on the latter beneath the angle of the shoulders is a somewhat 

 lunate-triangular black spot ; posterior femora testaceous. 



Var. y. Ac. marginatum. Zett. O. S. 110. — Griseous-brown, with the base of 

 the antennae, the lateral ridges of the thorax, and a longitudinal streak on 

 the hinder femora without, yellow. 



Var. d. Ac. humerale. Zett. O. S. 111. — Fuscous or griseous; thorax in the 

 middle with a large transverse whitish blotch, and a black triangular spot 

 on each side beneath the shoulders ; posterior femora with a testaceous 

 band. 



Var. £. Ac. dorsata. Zett. O. S. 112. — Dull-brown, with a broad whitish- 

 yellow streak on the central keel of the thorax, and on each side an abbre- 

 viated waved longitudinal black line. 



Var. ?. Ac. bimaculatum. Zett. O. S. 114. — Brown; thorax with an oblique 

 yellow patch on the angle of the shoulder, and terminated beneath by a 

 somewhat triangular black spot. 



In addition to these, various intermediate varieties occur both in colour and 

 markings. 



Not uncommon from the early spring till towards the end of autumn 

 in certain situations ; frequent in Battergea fields ; also at Ripley, 

 Hertford, Darenth and Coombe woods, the vicinity of Whittlesea 

 Mere, the New Forest, &c. 



B. Thorax with its dorsal keel considerably elevated; its produced hinder 

 portion not so long as the abdomen ; wings moderate or abbreviated ; 



stature robust. 



Sp. 2. bipunctatum. Corpus rohustam, rufescenti-testaceum aut J'uscum, scepe 

 variegatum, thorace in medio utrinque macula obliqua nigra ; alis elongatis. 

 (Long. corp. 3|— 6 lin.) 



