COLEOPTERA 



277 



Antennae rather long and slender. Head with two large but not definitely limited, 

 longitudinal and parallel impressions ; eyes small but borne on prominences of the genae. 

 Thorax strongly transverse, a little rounded at the sides, minutely sinuate at the hind 

 angles so as to prevent these from being obtuse; median channel prolonged to the base; 

 on each side at the base a large and deep depression limited externally in front by 

 a slight phca. Elytra parallel-sided, with a patch of paler colour (variable in extent) at 

 or close to the tip ; each with seven grooves (in addition to the one contiguous with 

 the lateral margin), the interstices rather narrow at their summits, the third with two 

 minute impressions. Legs rather long. Five specimens. 



I have much pleasure in naming this interesting form after my friend the Rev. T. 

 Blackburn, now of Adelaide, but formerly of Honolulu ; it was owing to his exertions 

 that attention was first directed to Hawaiian entomology. 



Hab. Kauai (Perkins). 



NEsoLVMNAEU^[, gen. nov. 



Mandibulae et maxillae elongatae, subrectae. Maxillae lobo externo prope basin 

 diviso. Oculi mediocres. Elytra regulariter punctato-striata, striis octo fere integris. 

 Corpus alatum. 



This insect has the facies of a Bcmbidiiun but it is nearer to Lymnaeum. The 

 impressions on the front of the head are rather more like grooves than they are in 

 Lyninacuvi, but not so groove-like as they are in BeiubidiiDii. The slender trophi are 

 much like those of Gnatholymiiaeum, and the lobe of the maxilla is conspicuously trans- 

 versely divided near the base : the elongation and straightening of the inner lobes, and 

 their denticulation, are not quite so perfect as in Gnatholyiiinacuiu, and the tips of the 

 mandibles are rather less dagger-like. The basal joint of the front tarsus of the male is 

 much enlarged, and both it and the second joint have the interno-distal angle so much 

 prolonged as to be spinose. The thoracic setae are normal, viz. two on each side. The 

 wings appear to be fully developed. 



(i) A^esolyiunacnm spurciim, Blackburn. 



Bciiibidiiuii spurcuin Blackburn, Ent. AIo. Mag. xvii. 1881, p. 228. 



The longer trophi distinguish this from all the other forms of Bembidiides except 

 GnatJiolyvmaeuni, and from that the black colour and delicately striate elytra separate it 

 at once. 



I have seen only two specimens of this species, besides Mr Blackburn's type. 



Hau. Oahu, Molokai, Maui. Molokai, June 1892 (Perkins). Oahu, W'aialua 

 mountains 1902 (Koebele). Haleakala, 4000 ft. (Blackburn). 



