On Insects from the Transoaal. 461 



The abundance of apparently normal larvge having two 

 pore-canals indicates that it is a normal condition of larvae of 

 that stage, which, should it so prove to be, would probably 

 constitute a character of some phylogenetic importance. The 

 right pore-canal sooner or later disappears, but persists 

 slightly longer than the right posterior pouch, which is very 

 transient in its character. 



With the exception of the arms, which become very long, 

 and the skeleton, which has been dissolved out, the pluteus, 

 after undergoing the above transformation, appears as shown 

 in fig. 6, which is the optical section of a young pluteus made 

 in the same manner as fig. 3, but in this case the pluteus is 

 lying on its ventral surface. 



Explanation of letters in Figures. 



a. Anus. oe. (Esophagus. 



cb. Ciliated band. oem. Outer egg-membrane. 



tern. Inner egg-membrane. rap. Right anterior pouch. 



lap. Left anterior pouch. rpp. Right posterior pouch. 



Ipc. Left pore-canal. rpc. Right pore-canal. 

 Ipp. Left posterior pouch. s. Stomach. 



m. 



Mouth. sc. Segmentation-cavity. 



me. Mesenchyme. 



LXII. — Some apparently undescribed Insects from the 

 Transvaal. By W. L. DISTANT. 



COLEOPTERA. 



LONGICORNIA. 



Fam. CerambycidaB. 

 Merionmda africana, sp. n. 



Black ; anterior and intermediate legs, basal non-dilated 

 portion of posterior femora, and the elytra (excluding apical 

 angles) ochraceous. Palpi, mandibles, and maxillas brownish 

 ochraceous. 



The antennse are somewhat obscurely pubescent and in- 

 wardly pilose. Head large, subquadrate, about as long as 

 broad, coarsely punctate. Pronotum about half as long again 

 as the head, sparingly but coarsely punctate, with a central 

 longitudinal linear incision and a large discal foveate impres- 

 sion, its lateral margins slightly convex and pilose. Scu- 

 tellum dull opaque black. Elytra sparingly but coarsely 



Ann. & Mag. N. Hist. Ser. 7. Vol. iii. 34 



