108 Mr. A. White on a new species of Longicorn Beetle, 



rugosis. Racemi breves, sessiles, terminales, cernui. Flores parvi, 

 membranacei, violacei. Bractese subulatse, membranacese. Sepala 

 conniventia, ovata, libera. Petala lanceolata duplo minora. La- 

 bellum c. columna connatum, ventricosum, ovatum, callo tripar- 

 tite ad basin. Columna brevis pyramidalis, partis liberse margi- 

 nibus latis crassis truncatis. Clinandrium nudum. Anthera plana, 

 membranacea, 4-locularis. PoUinia 4, oblonga, collateralia, om- 

 nino sejuncta, filis totidem rectis. nee replicatis, leevibus, apice con- 

 natis colligata. Ovarium cuniculatum, antice ventricosum. 



Popayan (Hartweg). 



This genus is near the true species of Diothonea, and like it in 



habits. It differs in its naked anther-bed and in the structure of the 



pollen masses. 



30. Restrepia cucullata ; foliis oblongo-linearibus coriaceis acutis 

 pedunculis filiformibus erectis brevioribus, sepalis lateralibus in 

 unum lineari-lanceolatum connatis supremo angustissimo, petalis 

 duplo brevioribus linearibus acuminatis, labello carnoso oblongo 

 laevi tricarinato, columna cucullata. 



Popayan (Hartweg). 



XIV. — Description of an apparently new species of Longicorn 

 Beetle from Mexico in the collection of the British Museum* 

 By Adam White, Assistant Zool. Dep. Brit. Mus. 



[With a Plate.] 



In M. Delesserf s ' Souvenirs d^un Voyage k PInde/ a very in- 

 teresting account has been given by M. Perrotet, his companion, 

 of the habits of the Dorysthenes montanus of Guerin, with which 

 I shall commence this paper, more especially as the insect about 

 to be described would be arranged close to it by many authors 

 (such as Laporte de Castelnau), although at present we have no 

 means of ascertaining whether the Prionacalus of this memoir, 

 and Psalidognathus of Mr. G. R. Gray, like the East Indian genus 

 alluded to, and unlike the majority of the group to which they 

 belong, live on the ground in elevated places destitute of large 

 trees. The D. montanus begins to appear above the surface of 

 the ground about the end of April, and comes up in immense 

 numbers till the beginning of the rainy season, which lasts from 

 the end of May or during June. They appear in such swarms 

 that the highways and by-paths are covered with them in some 

 places, and it is said that the bears of the country, at the season 

 when they abound, get up to the mountains to feed on them. 

 They have been observed by MM. Delessert and Perrotet coming 

 out of their holes in the ground, especially in the neighbourhood 

 of Coonoor,Kotirgherris and other places amongst the Neelgheries, 

 where they may be seen white, yellow and brown, accordingly as 



