df new Exotic Longicorn Beetles. 629 



with the generic type, whilst in the splendid species which he 

 described under the name of 



Sp. 3. Abryna exhnia, Newm., Entom, p. 298.* 



Westw. Cab, Orient. Ent. pi. 29, fig. 5. 

 (PI. XXIV. fig. 1,2,6; PI. XXV. 

 fig. 1). 

 the prothorax is destitute of the conical tubercles at its anterior 

 angles, and the elytra are quite rounded at the tips. I have given 

 in Plate XXIV. fig. 6, a figure of one of the elytra, seen obliquely, 

 of the type specimen of this beautiful insect in the collection of 

 the British Museum, in order to show the differences existing 

 between it and several other specimens which I dare not regard 

 as distinct species, but which it will be interesting to describe 

 and illustrate with reference to the question as to the extent of 

 variation to which a species may be subject. 



Of these individuals Plate XXIV. fig. 2, represents a splendid 

 insect of this genus in the collection belonging to Mr. Semper of 

 Altona (taken by his brother at Casiguran, near Luzon, in the 

 middle of June), which differs from the British Museum type of 

 A. eximia in having shorter and more convex elytra, the pronotum 

 strongly punctured (whereas it is nearly smooth in the British 

 Museum specimen), the antennae considerably longer (which 

 would indicate the male sex), whereas the mandibles are not so 

 large and flat as in the other individual (which we might regard 

 as indicating a female). 



The green colour in Mr. Semper's insect is much more tinged 

 with steel-blue, whereas it is tinged with yellow in the Museum spe- 



* " Viiidi-aenea, splendida, fulgore metallico mutante omnino Iseta, macu- 

 lisque impresses lanuginosis albis pulcherrime ornata; antennas basi distantes, 

 dimidio corporis longiores, articulus lus nigro-chalybeus, cajteri nigricantes, 

 fulgore metallico paullogaudentes, 3lio 4toque exceptis basi cano-lanuginosi; ociili 

 ad antennarum basin divisi; mandibulae valids, armalae, nigrae: caput punclunn, 

 epicranii facieique carina longitudinalis vix elevata nigra, faciei quoque macula 

 oblonga alba mediana, carin(i longitudinallter divisa, genarum altera transversa 

 linearis, alteraque pone orem subquadrata ; prothorax fere cylindraceus, dorso 

 ffiqualis, lateribus ante medium paullo gibbus, margine postico rectus, glaber, 

 utrinque maculis 4 albis signatus ; scutellum Iffive nigricans: elytra prothorace 

 paullo latiora, basi puncta, maculis 18 ornata, harum utriusque elytri 4 basin 

 versus sitae, Ima fere suturalis, subscutellaris, oblonga, 2da rotunda discoidalis, 

 3tia linearis, oblique lateralis fere humeralis, 4ta parva subrotunda, inter Imam 

 ac Sam sita ; apicem versus utriusque elytri 5, Ima et 2da arcuatae lineares 

 circulum fere formantes, alteras 3 parvas includentes : pedes mediocres paullo 

 obscuriores, larsis exlus apice hirsutis nigris. Long. corp. '8 unc. lat. '3 unc," 

 Newman, op. cit. p. 298. 



