Phytophaga Malayana. 23 



two-thirds the length of the body, third and fourth joints equal, 

 each nearly twice the length of the second. Thorax distinctly 

 longer than broad ; upper surface smooth, nitidous, a longitudinal 

 space on the middle disc impressed with minute punctures. Scu- 

 tellum triangular, its apex truncate, piceous. Elytra much 

 broader than the thorax, parallel, cylindrical, punctate-striate, 

 punctures strongly impressed at the base, fine towards the apex 

 of the elytron, interspaces plane in front, convex towards their 

 apex. Body beneath nearly glabrous. Unguiculi black. Meso- 

 sternum elongate, its apex obtuse, more or less deeply emarginate. 



'I'his species is in my opinion undoubtedly the L. cyanipennis of 

 Fabricius, the insect described by M. Lacordaire under that name 

 being a closely allied but quite distinct species. Fabricius gives 

 Sumatra as the locality of iiis L. cyanipennis, whilst M. Lacor- 

 daire's insect (for which I would propose the name of L. 

 Lacordairii) is a native of Continental India. The true cyani- 

 pennis, though brought to this country in some abundance 

 by Mr. Wallace, was up to that time exceedingly rare in collec- 

 tions, the only specimen previously known to me being one in my 

 own cabinet collected in Sumatra by Sir Stamford Raffles. The 

 tvvo species, although agreeing very closely in form, sculpture 

 and coloration, may be readily known from each other by the 

 relative proportion of their antennae ; in L. cyanipennis these 

 organs are at least two-thirds the length of the body ; in Z. 

 Lacordairii they do not exceed one-half its length. I possess a 

 series of individuals of both species, and I do not find the least 

 tendency to approximation between the two ; all the specimens 

 from India, Siam and Birmah agreeing in having short antennae 

 (as described by Lacordaire) ; all those from Sumatra and other 

 parts of the Malay Archipelago, on the other hand, having them 

 elongate. The synonymy ought to stand thus : — 



Lema cyanipennis, Fabr. Syst. El. i. 472 . Malay Archipelago. 

 cherubim, Lac. Mon. Phyt. i. 370. 



Lema Lacordairii Indian Continent. 



cyanipennis, Lac. Mon. Phyt. i. 370. 



29. Lema cyaneslhis, Boisd. 



Lac. Mon. Phyt. i. p. 375. 



" Modice elongata, parallela, rufo-ferruginea ; pedibus posticis 



infuscatis, pectore abdoraineque nigris ; prothorace elongate, 



pone medium valde coarctato, supra ante basin evidenter 



transversim sulcato, disco convexo, Isevi ; elytris cyaneo- 



