CATALOGUE OF ORTHOPTEROUS INSECTS. 



the metanotum, and the base of the femora dark red. The 

 male is very slender and cylindrical ; it is not glossy, and is 

 slightly granulose. The head is elongated and narrowed 

 behind the eyes, between which, in both sexes, are two 

 small conical points. The antennae are rather longer than 

 the head, and 20-jointed. The prothorax is armed at each 

 extremity with two small spines. The mesothorax is long 

 and slender, with several pairs of minute conical tubercles, 

 and a large one, bifid at the apex, at the hinder extremity. 

 The metathorax is rather shorter than the mesothorax ; 

 the hinder division very short, and armed, as well as the 

 hinder extremity of the anterior division, with a raised 

 point, as is also the case with each of the segments of the 

 abdomen in the middle of its hinder margin. In both 

 sexes each of the abdominal segments has the base and 

 extremity slightly dilated on each side, arising from the 

 presence of small lateral tubercles. The legs are long 

 and slender ; the femora slightly granulose. The female is 

 more robust, with somewhat shorter legs ; the surface of 

 the body is more granulose ; the elevated point at the ex- 

 tremity of the mesothorax is simple ; and the operculum 

 extends to the extremity of the abdomen. In the specimen 

 of this sex before me, the left middle femur is armed with 

 granules, and an erect spine near the base ; but the middle 

 leg on the right side is simple, probably having been re- 

 produced. 



Plate XXIII. Fig. 2. The male, of the natural size. 2 a. The 

 body seen sideways. 2 b. The four terminal segments of 

 the abdomen seen sideways. 



Fig. 3. The female, of the natural size. 3 a. The hind part of 

 the thorax and the abdomen seen sideways. 



21. Bacillus Cuniculus, Westw. Plate VI. fig. 2. 



Elongatus, gracilis, cylindricus ; capite inter oculos spinis 

 duabus auriformibus armato ; antennarum articulo basali 

 magno, dilatato ; thorace abdominecpie inermibus, hujus 

 segmenti ultimi angulis posticis acute productis medioque 

 parum inciso ; femoribus anticis supra dimidio basali ser- 

 ratis, quatuor posticis subtus ante apicem spina armatis 

 (foem.). 



Long. corp. unc. 6 ; cap. lin. 3| ; proth. lin. 2 ; mesoth. 

 lin. 16 ; metath. lin. 12 ; abdom. unc. 2, lin. 1\ + lin. 6 = 

 unc. 3, lin. \\. 



Hab. Ceylon. B.M. 



Long, slender, cylindrical, smooth, dirty luteous-brown ; 

 the horns of the head and base of the abdomen dark brown. 

 The head with two long curved spines between the eyes 

 (like the ears of a rabbit). Basal joint of the antennae broad 



and depressed. Mcso- and metathorax long and simple, ' 

 scarcely dilated at the base of the legs. Abdomen long, 

 cylindrical and simple ; the eighth segment very thick ; 

 the ninth longer, with its posterior lateral angles prominent ; 

 the middle of the hind margin slightly notched. The 

 operculum extends to the extremity of the ninth dorsal 

 segment, and is convex near its extremity. The legs are 

 long and slender ; the fore femora, from the base to the 

 middle of the straight portion, are serrated on the upper 

 edge ; the four posterior femora are armed beneath near 

 the tip with a small spine, and the four hind tibiae are 

 slightly serrated at the tip. 



Plate VI. Fig. 2. The female insect, of the natural size. 

 2 a. The head seen sideways. 2 b. The extremity of the 

 abdomen seen sideways. 



Obs. A small specimen, apparently of this species, in 

 the collection of the East India House, brought from Java 

 by Dr. Ilorsfield (" No. 5 "), has the two horns of the head 

 shorter, more foliaceous, with rounded serrated upper edges, 

 and the following proportions : — 



Long. corp. unc. 4£ ; cap. lin. 2 ; anten. lin. 3 ; proth. 

 lin. 2 ; mesoth. lin. 11 ; metath. lin. 8 ; abdom. lin. 22+ 

 lin. G=unc. 2\. 



Another still smaller specimen, in the same collection, 

 also from Java (Ilorsfield, " No. 4 "), agrees with the last- 

 mentioned specimen, but the head is oblong-cylindrical 

 and entirely destitute of horns. Its measurement is as 

 follows : — 



Long. corp. unc. 3, lin.'7 ; cap. lin. If ; anten. lin. 5£ ; 

 proth. lin. 1| ; mesoth. lin. 9 ; metath. lin. 7\\ abdom. 

 lin. 19 + lin. 5=unc. 2. 



This specimen seems to unite the present with the fol- 

 lowing species, from which last it, however, differs in the 

 four posterior femora being furnished only with a small 

 lobe-like spine on the under side near the tip. 



The National Collection possesses several specimens, 

 which might at first sight be mistaken for separate species. 

 One of these, from Silhet, has the head large, oval, and 

 flattened, of a dull luteous-brown colour, with two dark 

 lines on each side behind the eyes ; there is also only one 

 spine on the upper edge of the middle femora near the 

 base ; and the meso- and metathorax are wider (probably 

 arising from pressure in drying). Other specimens differ 

 in the number of spines on the legs. «. 



22. Bacillus Hyphereon, Westw. Plate VI. fig. 1. 



Elongatus, gracilis, cylindricus, laevis, luteus ; capite 

 inermi ; antennis brevibus, 27-32-articulatis, articulo basali 

 lato, depresso; abdomine e basi ad apicem sensim atte- 



