and a new genus of Rliynco-phorous ColcojJtera. 25 



these latter individuals are females, or whether I have 

 only males before me, I am unable to state with certainty. 



Pentarthrum ■prolixum, n. sp. Perelongatum, depres- 

 sum, ferrugineum, nitidum; capite elongato anterius an- 

 gustato, oculis a collo remotis ; prothorace antrorsum 

 fortiter angustato, post marginem anteriorem leviter con- 

 stricto, lateribus mox ante angulos posteriores rotundatis, 

 sat fortiter et crebre punctato, dorso piano vel obsolete 

 inipresso ; elytris elongatis, parallelis, vix striatis scd 

 regulariter seriatim punctatis. Long. exc. rost. 4 — 5 mm. 

 lat. vix 1 mm. 



Mas., rostro breviore et crassiore, capite paulo longiore, 

 antennis paulo ante medium insertis; segmento ultimo 

 ventrali latins impresso. 



Fem., rostro tenuiore capite duplo, longiore, antennis 

 longe ante medium insertis; segmento idtimo ventrali 

 fere piano. 



The very elongate and depressed form of this Pent- 

 arthrum^ and the form of the head and rostrum, ally it to 

 a group of species found in New Zealand, viz., P. Wol- 

 lastonianum and P. debile; the rostrum has a slight con- 

 striction between the eyes and the insertion of the an- 

 tennae, and is a little dilated towards the apex ; the series 

 of punctures form very regular, somewhat depressed rows, 

 but can hardly be correctly said to be placed in stria: 

 these stride (if they may be so called) are not deeper at 

 the apex than elsewhere. 



I have seen one male and two females of this species ; 

 they were found in the stems of ferns. Mr. Blackburn 

 informs me that the female is not rare, but that he has 

 only found two individuals of the male, and that these 

 were not accompanied by any females; he was thus led to 

 su])pose that what I have considered the sexes were dis- 

 tinct species, but I do not think such is the case. 



Pentarthrum obscurum, n. sp. Angustulum, minus 

 depressum, piceum vel ferrugineum, nitidum, fortiter 

 punctatum ; prothorace crebre fortiterque punctato, an- 

 trorsum fortiter angustato, pone apicem leviter constricto, 

 dorso hand depresso ; elytris profundius striatis, striis 

 fortiter punctatis, versus apicem baud deletis. Long. 

 2| mm. 



The antennce in this species are small, with the 2nd 



