the OrtJioptera in the British Museum. 145 



all round the base; lower iiuier sulcus pale with the black colour 

 from the inner side partly extending into it. Hind tibiae on the 

 inner side brownish, with a sharp postbasal ring, and another ring, 

 less distinct, behind the middle, pale. Middle part of the two last 

 tergites, the whole hind margin of the anal tergite, tubercles of the 

 supra-anal plate and the end of the cerci, black. 



Length of body 21 mm. ; of pronotum 55 mm. ; of elytra 16 mm. ; 

 of hind femur 13 mm. 



Dimensions of a female (paratype) are as follows : Length of 

 body 25 mm. (somewhat contracted); of pronotum 7 5 mm.; of 

 eljrtra 19 mm. ; of hind femur 165 mm. 



British Museum specimens : Cape Colony {Dr. Kraus 

 col.), 1 ^ {type', at the same time it is the specimen " f " of 

 Caloptenus crassus Walk.) ; S. Africa, 2 (^(^, 1 $ {2)aratypes). 



3. Rhachitopis ceraseus, sp. n. 



(Plate I, fig. 4.) 



(J. Larger and more rugose than any of the two species 

 described above. Frontal ridge with the margms parallel, but 

 not quite straight, owing to the rugosities of the face, sulcate 

 throughout, almost reachmg the clypeus. Fastigium of vertex 

 distinctly impressed. Pronotum strongly rugose; median keel 

 before the first sulcus almost cristate, though low, between the 

 sulci low, not higher than the rather large tubercles, in metazona 

 subcristate in the fore half and gradually lowered towards the 

 hind angle. Last tergite widely rotundato-emarginate. Supra- 

 anal plate trapezoidal ; outer margins straight ; hind angles about 

 90°, not rounded, even slightly attenuate ; median keel low, sulcate 

 throughout, bifurcate in the basal third; two small submedian 

 tubercles and two larger submarginal ones; one small tubercle in 

 the basal impression. Cerci with the basal (descendmg) part 

 somewhat incrassate, punctured; the apical (ascending) part 

 slightly curved outwardly, more than twice as long as the basal 

 part, with the apex somewhat thickened and rotundato-truncatc, 

 distinctly projecting above the supra-anal plate. 



General coloration reddish- brown, with indefinite brownish and 

 whitish marmoration and spots. Face reddish, with white and 

 brown marks; cheeks whitish. Lateral lobes of pronotum with 

 a pale submedian spot and a blackish spot above it. Elytra with 

 indefinite brownish spots, formmg ii-regular fasciae. Hind femora 

 with two brown fasciae on the upperside; the lower inner sulcus 

 dark cherry-red, the same colour extending to the lower part of 



TRANS. ENT. SOC. LOND. 1922. — PARTS I, II. (JULY) L 



