290 On new Species of Histcritla\ 



base, from the base they are gradually divergent until they 

 cease near the edge of the lobe, the base of the keel is impressed 

 triangularly ; the mesosternum is strongly and obtusely pro- 

 duced in front, the projection is immarginate, but at the sides 

 there is an oblique stria which is not, however, joined to the 

 metasternal lateral stria, there is a median canaliculabion 

 common to both the meso- and meta-sterna and there is no 

 visible suture between these two segments, the punctures on 

 the sternal plates are large, sparse, and very irregular ; the 

 anterior tibise are 6-dentate. 



This is a very distinct species, but in size and form it 

 resembles T. Walkeri, Lew. The chief distinguishing specitic 

 characters of all the Teretrit are in the sternal ])lates. I have 

 compared it with the type of T. corticalis^ WoU.; the last is 

 smaller and of a lighter colour. 



Hah. S. Thomas I., Gulf of Guinea {Mocquerys^ 1900). 



Epiechinus MarseuU. 



This name is given to E. ktspidus, Mars., it being clearly 

 evident that the species described as kispiJ7is, Payk., in the 

 ' Abeille,' i. p. 70 (1864), cannot be the same as PaykuU's 

 species. The latter is described (Mon. p. 98) as having five 

 frontal longitudinal carinse ; the first has the frontal lateral 

 borders raised and one median carina. In my collection there 

 are six Asian species of this genus ; Marseul apparently only 

 knew one. 



EXPLANATION OF PLATE X. 



Fiff. 1. Placodes opacus, Lew. 

 Fiff. 2. Platylister viirahilUy Lew. 



Fig. 3. extrarius, Lew. 



Fig. 4. Proholosternus penmoidus, sp. ii. 

 Fig. 6. Baconia hricata, Lew. 

 Fig. 6. Phelisterfestivi/s, Lew. 

 Fig. 7. Notolister sidcicollis, Lew. 

 Fig. 8. Ilister Marshalli, Lew. 

 Fig. y. iSotoccdis satur, sp. n. 

 Fig. 10. llomalopygus remex, 8]). u. 

 Fig. IL Coproxenua MarshalH, Lew. 

 Fig. 12. Terapus imiricatus, sp. n. 



Except the new species, those figured in the Plate are described in 

 iornier numbers of the Ann. & Ma{^. Nat. Hist. 



