OF NEW ZEALAND. 287 



raised. Metasternum elongate. Tarsi slender, with their joints simple ; 

 fourth joint small, but not minute. In Betarmon gracilipes the coxal 

 plates are short throughout their whole breadth, the trochanteral portion 

 being not twice as long as the very short femoral portion ; in the other 

 three species the trochanteral portion is broader, and the femoral nearly 

 completely absent. I think there is no doubt about the affinity of these 

 species, their nearest recorded ally being apparently the European 

 Betarmon, from which they differ only in some details of structure. 



502. B. gracilipes, Sharp; Ann. Mag. Nat. Hist., May, 1877. 

 B. niger, angustulus, pedibus tenuibus fusco-testaceis : oculis fortiter 

 prominulis ; prothorace elongate, elytris angustiore, subtiliter sat crebre 

 punctate, subtiliter pubescente ; elytris fere- opacis, leviter striatis, sed 

 striis perspicue" punctatis, brevissime pubescentibus ; antennis articulo 

 tertio quam secundus fere minore. 



Long., 4-4 \ mm. 



The black colour, slender legs and peculiar form of the thorax are 

 quite sufficient characters to distinguish this little species. 



This insect was sent from Auckland by Mr. Lawson ; and I have 

 recently received it from Captain Broun, who found it at Tairua. 



503. B. frontallS, Sharp ; Ann. Mag. Nat. Hist., May, 1877- 

 B. colore variabilis, rufescens, plus minusve infuscatus, elytris indistincte 

 fusco-vittatis, abdomine nigricante, antennis fuscis, basi testacea ; angus- 

 tulus, minus nitidus, evidenter pubescens ; thorace, crebre minus sub- 

 tiliter punctate, angulis posterioribus elongatis, acutis, bene diver- 

 gentibus ; elytris sat profunde striatis ; antennis articulis secundo et 

 tertio vix abbreviatis. 



Long., 4^ mm. 



This little species has much the appearance of a small Betarmon 

 picipes, the sculpture, pubescence, general form and colour being all 

 somewhat similar. 



Found at Tairua by Captain Broun. 



504. B. IsetUS, Sharp; Ann. Mag. Nat. Hist., May, 1877. B. 

 late rufo-testaceus, elytris testaceis, plus minusve fusco-vittatis, antennis 

 extrorsum fuscis ; sat angustus, subnitidus, evidenter pubescens ; thorace 

 crebre punctato; elytris sat profunde striatis; antennis articulis secundo 

 et tertio haud abbreviatis ; corpore subtus rufo-testaceo, concolori. 



Long., 5 mm. 



This is very similar to Betarmon frontalis, and may perhaps be only 

 an extreme form of it, for that species is evidently very variable ; but 

 the bright colour of the two individuals before me seems to distinguish 

 it pretty distinctly. 



Tairua (Captain Broun). 



505. B. ObSCUrilS, Sharp ; Ann. Mag. Nat. Hist., May, 1877. 

 B. fusco-testaceus, antennis fuscis, basi testacea, pedibus pallidis, abdo- 

 mine nigricante ; opacus, evidenter pubescens ; prothorace dense sub- 



