PIIASMIDiE. PYGIRHYNCHUS. 



.".9 



bispinoso ; meso- et metanoto medio carinatis ; segmentis 

 abdominalibus lateribus emarginatis, dorso in medio et la- 

 teribus irregulariter carinatis ; pedibus granulatis ; femo- 

 ribus posticis intus ad basin dilatatis (mas et fcem.). 



Long. corp. unc. 2\ ; anten. lin. 8 ; proth. lin. 2 ; me- 

 soth. lin. a\ ; metath. lin. 3£ ; abdom. lin. 7^+lin. o-^— 

 lin. 13. 



Hab. Colombia et Venezuela. B.M. 



Obscure blackish-brown and opake, the surface irregu- 

 larly granulose. The head is widened in front to the eyes 

 with two erect spines on the crown in the middle and seve- 

 ral smaller ones near the hind margin. The antennae are 

 scarcely longer than the mesothorax, with the basal joint 

 large, oval and flattened. The prothorax has two raised 

 longitudinal lines posteriorly dentated. The mesothorax is 

 gradually widened from the anterior margin to the middle, 

 behind which its sides are straight ; the disc is irregularly 

 granulated, with a central longitudinal raised line. The 

 metathorax is oblong, with a similar raised central line. 

 The abdomen is rather wider than the metathorax ; the 

 basal segments short, the fifth and following gradually nar- 

 rowed and rather longer ; the sides of each joint are emar- 

 ginate, so that each side of this part of the body forms a 

 series of scallops ; each segment, moreover, is furnished 

 down the middle of the back with two curved narrow 

 raised lines, enclosing between them an elongate-oval space, 

 and the sides are further marked with curved raised lines ; 

 the ninth segment is deeply impressed transversely at a short 

 distance from its base, its apex being acuminated ; beneath 

 it bears two small oval styles, the operculum extending 

 beneath the seventh, eighth, and base of the ninth joints. 

 The legs are rather short ; the femora with very small tuber- 

 cles on the fore edge ; the two hind femora dilated at the 

 base behind. The basal joint of all the tarsi is short. The 

 body beneath is similarly coloured, opake and carinated as 

 above. The male is small and narrow, with the sides of 

 the body parallel, (lie terminal segments of the body being 

 dilated and angulated beneath ; the head is armed with 

 tubercles instead of spines, and the hind legs are slightly 

 dilated at the base. 



An immature specimen of a female measuring 1 Q>\ lines 

 in length, differs only from the female above described in 

 having the abdominal segments wider and their emarginated 

 sides more deeply scalloped. 



Plate II. Fig. 2. The female, of the natural size. 2 a. Head 

 and front of the body seen laterally. 2 b. Three terminal 

 segments of the abdomen seen laterally. 2 c. The male, of 

 the natural size, seen laterally. 



Genus 10. CEROYS. 



Ceroys, Serville. 



Body long, subcylindrical. Head often furnished with 

 auriform appendages. Ocelli wanting. Antennae long, 

 multiarticulate, setaceous. Thorax long, smooth, but 

 spined. Mesothorax at least three times the length of the 

 prothorax. Abdomen subcylindrical, suddenly constricted 

 near the apex, which is swollen in both sexes, with the ter- 

 minal, dorsal and ventral plates simple, and the anal styles 

 not prominent. Legs of moderate length ; femora not mem- 

 branous ; anterior small, four posterior femora more or less 

 foliaceous. 



1. (164.) Ceroys perfoliatus. 



Brunneus, scaber ; capite comibus duobus auriformibus ; 

 prothoracis margine postico spinis duabus et mesothoracis 

 medio duabus ; abdominis segmento 4to postice foliato ; 

 femoribus 4 posticis ante et pone medium perfoliatis. 



Long. corp. maris 1" 9'"; fcem. 3" 6'". 



Cladomorphus perfoliatus, Gf.R. Gray, Syn.Phasm. p. 15. 



Serville, II. N. Orth. p. 263 (Ceroys perf.). 

 Acanthoderus perfoliatus, Burmeister, Ilandb. d. Ent. ii. 



2. p. 569. 



Bab. In Brasilia. B.M. 



Obs. The typical specimen of this species described by 

 Mr. G. R. Gray, is a female, and is contained in the Bri- 

 tish Museum Collection. Its proportions are as follow : 

 — Corp. unc. 3-Jj ; anten. lin. 22 ; proth. lin. 2i ; mesoth. 

 lin. 9 ; metath. lin. 6£; abdom. lin. 13 + lin. 5 = lin. 18. 

 The basal joint of the tarsi is as long as the second and 

 third joints united ; the tiree terminal dorsal segments of 

 the abdomen are short and form a short ovate mass, the 

 middle (eighth) joint being produced in the middle of its 

 hind margin into an acute point, and the terminal joint de- 

 flexed ; the operculum does not extend to the extremity of 

 the ninth dorsal segment. 



2. (165.) Ceroys nmltispinosns. 

 Rugosus, brunneo-virescens ; vertice tuberculis spinosis ; 

 prothorace spinis duabus fortibus marginis postici ; meso- 

 thorace prothorace fere 4plo longiori, carina media longi- 

 tudinali per segmenta basalia abdominis extensa ; lateribus- 

 que tuberculis minutis distantibus et in mare utrinque 

 spinis duabus vel tribus fortibus ; in foemina utrinque spina 

 unica armato ; metathorace utrinque in medio spina forte 

 etiam armato, abdominis segmentis utrinque dilatatione fo- 

 liacea ; 3to supra ad apicem lobo apice acuto, 4toque lobo 

 simili at majori et rotundo ; ultimoque lobo simili laminam 



i 2 



