PHASMID.E. ACANTHODERUS. 



57 



giiiate ; the anal st3-les are thick, incurved, setose, and 

 pointed at the tips. The legs are very slender ; the femora 

 with two rows of short spines on the lower angles, less 

 distinct in the anterior pair, and the tibiae have three small 

 spines between the base and the middle ; the tarsi are very 

 slender, with the basal joint longer than all the rest united. 



Plate XXIV. Fig. 5. The male iusect, of the natural size. 

 5 a. The same seen laterally, with the hmbs omitted. 5 h. 

 The three terminal segments of the body seen laterally. 

 5 e. The terminal segment with the anal styles seen from 

 behind. 



29. (157.) Acanthoderus Arispa, TFestw. 

 Plate XXVI. fig. 5, female. 



Fuscus, capitis et prothoracis lateribus luteis ; opacus, ru- 

 gosus ; capite brevi, gibboso, spinis duabus spinnlisque non- 

 nullis verticalibus ; antennis longitudine saltem pedum an- 

 ticorum ; abdomme brevi segmeutis quinque basalibus di- 

 latatis, convexis, lobo medio utrinque spinoso marginis 

 postici, lateribusque tuberculo couico armatis ; pedibus tu- 

 berculatis (foem.). 



Long. Corp. lin. 17^; anten. lin. 11 ; proth. liu. If; 

 mesoth. liu. 3^ ; metath. lin. 2 ; abdom. lin. oi+liu- 3^ = 

 lin. 9. 



Hab. In Columbia {B. Gaudichaud). In Mus. Saun- 

 ders. 



I have seen only one female individual of this species, 

 which differs from all the others with which I am ac- 

 quainted in the shape and appendages of the abdominal 

 segments, tuberculated legs, &c. It may possibly be the 

 female of A. Tolima, but I have no proof of such a fact. 

 The head is short, very convex, with various minute spines 

 on the crown, two being of larger size than the rest. The 

 antennae are at least as long as the fore legs. The pro- 

 thorax is furnished with numerous small granules and two 

 small erect points in the middle of the hinder margin. 

 The mesothorax and metathorax are also granulose, with a 

 central slender raised line and two short spines on the disc 

 in front of the middle and two on the hind margin ; the 

 metathorax is short, with two small spines in the middle. 

 The abdomen has the basal segments gradually dilated into 

 an oval mass, convex above, rugose ; the basal segment 

 with two small spines in the middle, and two larger towards 

 the sides on the hind margin ; the second segment has the 

 hinder margin in the middle raised into a broad thin plate, 

 with a spine on each side and two converging carinee in the 

 middle ; the third and two following segments are broad, 

 with the middle raised into a much narrower lobe, the disc 

 with converging carinse and the lateral margins dilated 



behind ; the sixth segment is much narrower than the pre- 

 ceding ; and the three terminal segments are much com- 

 pressed, and as long as the four preceding segments united, 

 with an acute carina along the middle, the sides slightly 

 rugose ; the seventh segment being as long as the eighth 

 and ninth united. The operculum extends to the extre- 

 mity of the abdomen ; it is but slightly swollen in the mid- 

 dle. The legs are of moderate length, armed with nume- 

 rous small conical lobes on the femora and tibiae, those of 

 the fore legs being less strongly marked than in the hind 

 legs ; the tarsi have the basal joint rather longer than the 

 three following joints united. 



Plate XXVI. Fig. 5. The female, of the natural size. 5 a. The 

 head seen sideways. 6 b. The abdomen seen sideways. 



30. (158.) Acanthoderus Quindensis. 

 Plate XXV. fig. 3, male, fig. 4, female. 



Fusco-nigricans, opacus, subrugosus ; pedibus magis pi- 

 ceis ; capite utrinque luteo ; mesothoracis parte antica et 

 lateribus subasperis, segmentis abdominalibus postice extus 

 angulatis, siuguloque supra postice in carinam parvani 

 producto ; pedibus longis, simplicibus. 



Long. Corp. maris, hn. 14 ; anten. lin. 14 ; proth. liu. If ; 

 mesoth. liu. 2 ; metath. lin. 2 ; abdom. liu. 5 + lin. 3 = 

 lin. 8. 



Long. Corp. foem. lin. 17 ; anten. lin. 13 ; proth. lin. 2 ; 

 mesoth. lin. 2\; metath. hn. 21 ; abdom. lin. 5i-|-lin. 2\ 

 =lin. 8. 



Bacteria Quindensis, Goudot in Guerin, Mag. de Zool. Lis. 



p. 5 (sine descr.). 



ffab. In regionibus frigidis Cordillerae centralis Nova 

 Granada, sub truncis arborum procumbentium, ubi indi- 

 vidua duo vel tria societate invenit B. Goudot. In Mus. 

 Saunders. 



Obscure blackish-brown, slightly rugose above. Legs 

 more pitchy. Head dirty luteous at the sides. The male 

 is much narrower than the female, with the abdomen 

 nearly cylindric ; that of the female is broader and sub- 

 convex. The head is unarmed, nearly square, shorter in 

 the male. The antennae long, with long slender joints. 

 The meso- and metathorax of nearly equal length, the 

 former with several small obtuse points in front and along 

 the sides. The abdomen has the segments produced into 

 small angulated points on each side of the hind margin, and 

 there is a small elevated point forming a short ill-defined 

 carina in the middle of the hind margin of each segment. 

 The terminal segment of the male is produced behind at 

 the sides into two strong deflexed points, and is concave 



I 



