ninth ventral segment being swollen at its base, 

 are rather short and entirely destitute of spines. 



Plate VII. Fig. 6. The male, of the natural size. 6 a. The 

 three terminal segments of the abdomen seen from the 

 side. 



Genus 2. PACHYMORPHA. 



Pachymorpha, G. R. Gray, Be Ilaau, Servi/le. 

 Bacillus, p., G. R. Gray (olim), Burmeister. 



Body apterous, subcylindric or depressed, carinated down 

 the middle and scabrous. Antennae very short ; basal joint 

 large, depressed. Head often bicornuted. Legs generally 

 rather short, the four posterior with denticulations on the 

 upper edges ; the basal joint of the fore tarsi not longer 

 than the second joint. 



1. (37.) Pachymorpha squalida. 

 Plate XXII. fig. 4, female, var. 

 Subcylindrica, rugosa, brunneo-nigra albo mixta ; capite 

 bicorni ; mesothorace abdomineque ad apicem in medio cari- 

 natis, hoc basi subdepresso et apice compresso ; pedibus 

 mediocribus, posticis quatuor externe subdentatis ; antennis 

 11-articulatis (foeni.). 



Loug. Corp. indiv. typic. 2" 1'"; anten. 3|"' ; proth. H"' ; 

 mesoth. 5'" ; metath. 4'"; abdom. 8"' + 5i"'= ISi. 



CATALOGUE OF ORTHOPTEROUS INSECTS. 

 The legs 



KO 



Sy7i. Phasm. 



Bacillus squalidus, Hope, 3IS. 



G. R. Gray, E,tf. AvstruL p. 3. f. 



p. 21 (Pachymorpha squalida). 

 Servi/le, H. n'Orth. p. 2(J0. 

 Burmeister, Handb. d. Ent. ii. 2. 562. 



Hah. In Austraha. In Mus. Hope. 



A specimen of this species from New Holland, in the 

 collection of the Rev. F. W. Hope, is represented in the 

 accompanying figure (Plate XXII. fig. 4), differing from 

 the typical specimen (also in the Hopean Collection) in its 

 narrower form, in its much less rugose upper surface, in the 

 horns of the head being small and conical (and not large 

 rounded lobes), and especially in the different form of the 

 terminal segments of the abdomen of the female, which in 

 the type are strongly carinated, the eighth segment being 

 elevated far above the ninth, which has its upper surface 

 straight, but its under considerably sinuated. 



Its proportions are as follow : — 



Long. corp. unc. 2i; anten. hn. 4 ; proth. lin. U; me- 

 soth.Hn.5; metath. lin. 4 ; abdom. lin. I0 + hn.7 = Iin. 1". 



It is entirely of an obscure grey colour varied with brown, 

 the upper surface slightly rugose and irregular, with a few 



scattered polished granules and short raised lines. Tlie 

 head is oblong, raised lietween the eyes, where it is armed 

 with two short erect spines ; the hind margin is elevated 

 and slightly tubercled at its sides. The antennaj are about 

 half as long again as the head, 11 -jointed, the basal joint 

 large and wide at its base, the upjicr surface with a raised 

 line down the middle. The prothorax above is irregular, 

 with an impressed line in the centre, and with two pro- 

 minent granules in tlie middle of its fore margm. The 

 meso- and metathorax and the abdominal segments have a 

 raised line down the middle of the back ; the five basal seg- 

 ments have the sides parallel, the sixth is gradually nar- 

 rowed to its hinder extremity, the seventh is parallel at the 

 sides ; the eighth and ninth are long and gradually acumi- 

 nated to the tip, which is entire and pointed, the two minute 

 caudal styles not being visible from above. The opercu- 

 lum is small, and does not extend to the middle of the 

 ninth dorsal segment ; it is notched at its tip. The legs 

 are rather short and entirely destitute of spines. 



Plate XXII. Fig. 4. The female specimen above described, of 

 the natural size. 4 a. The head and prothorax seen side- 

 ways. Ab. The three terminal segments of the abdomen 

 seen sideways. 



Should this insect ultimately prove to be distinct, it mav 

 be allowed to retain the specific name of Bacillus Pasithoi 

 which I had proposed for it. 



2. (38.) Pachymoi-pha ? simplicipes. 



Corpore (prsesertim foeminse) rugoso, fusco-cinereo ; 

 thorace et abdomiue carina dorsah, vertice cornubus duobus 

 pan-is depressis ; capite postice subtuberculato ; protho- 

 race subquadrato, tuberculis duobus spiniformibus marginis 

 antici ; mesothorace tuberculis duobus spinosis marginis 

 antici (in foemina majoribus) ; metathorace mesothorace 

 paullo breviori ; abdomine fceminse segmentis 4 vel 5 basa- 

 libus utrinque tuberculo parvo spinoso in margine postico ; 

 pedibus mediocribus, corpori concoloribus, in utroque sexu 

 muticis (mas et fccm.). 



Long. corp. maris 16 lin., fccm. 20 lin. 



Pachymorpha simplicipes, Servi/le, H. n. Orth. p. 259. 

 Hah. In Nova Hollandia. In Mus. Paris. 



Ohs. The male of this species which I have examined, 

 in the National Museum at Paris, has the penultimate seg- 

 ment of the abdomen much swollen, oval, and nearly twice 

 the width of the preceding segment. I did not find tin- 

 female. 



