160 ADEPHAOA. [Notems. 



NOTERVS, Clairville. 



This genus comprises six species, wlaich are found in the European 

 region and in Japan ; they live in stagnant water : the males are distin- 

 guished from the females by having the fifth joint of the antennje 

 dilated, and also by having the first joint of the anterior tarsi much 

 enlarged. 



The larva of Noteras " crassicornis " is described and figured bj' Westwood (Classi- 

 fication, i., p. 102, — p. 100, Fig. 6, 5) : it is brown with two ochreous bands across 

 the back, and is about 6 mm. long; the shape is elongate oval, attenuated towards the 

 posterior extremity ; the head is produced into a long slender beak, lonsjer than the 

 rest of the head, the jaws meeting together at its tip ; the terminal segment is 

 furnished with two moderately long cerci, and is produced between them into a long 

 pharp point ; it is evidently highly predaceous. 



1. Size smaller; prosternura not keeled in front; male 



with fifth joint of antennas much larger than sixth . . N. CLAVICORNIS, Be 0. 



2. Size larger ; prosternum keeled in front ; male with 



fifth and sixtli joints of antennae of about equal size . . N. SVXUSVS, Marsh. 



m. clavicornis, De G. {crassicornis, Midi. ; capricornis, Herbst., 

 teste Bedel and Schaum). Oval, rather convex, somewhat shining, 

 castaneous ; head and thorax lighter, as a rule, than elytra ; elytra with 

 large coarse punctures arranged in irregular rows towards apex, but 

 ceasing towards base. Male with the antennfe thickened, irregular, fifth 

 and sixth joints largest, the fifth double as long as the sixth, which is 

 transverse ; underside of head and thorax spotted with black. Female 

 with the antennas not irregular, underside unicolorous. Long. 4, 

 lat. 2 1 mm. 



Local ; rare in the Loudon district, Battersea and West Ham (Power) ; Wickeu 

 and Horning Fens J Devonshire; Swansea; common in tlie Midlands (Repton, &c.) j 

 Askham Bog, York ; apparently not found further north than Y(jrkshire; Ireland, 

 Arma'j-h, and near Belfast ; not recorded from Scotland ; on the Continent it ranges 

 from Norway and Sweden to Portugal, but is not common. 



N. sparsus, ]\Iarsh (semipuncfatus, F. ; crassicornis, Sturm ; eapri- 

 coi-nis, Herbst., teste Sharp ; claoicoruis, De G., teste Bedel). Larger 

 tlian the preceding, but closely resembling it ; disc of thorax often 

 darker than sides ; elytra with irregular coarse punctures towards apex, 

 wliich cease towards base ; male Avith the antennas thickened, irregular, 

 fifth and sixth joints of about eqiud size, neither being transverse ; 

 underside of head and thorax broadly dark. Long. 4|, lut. 2| mm. 



Commoner than the preceding in many places, but rarer in the Midlands ; abundant 

 in the London district, and common in the south in places; also occurs in the 

 Swansea district. I have never found it in Derbyshire or Lincolnshire, and can find 

 uo record further north, nor is it recorded from Scotland; according to my own 

 i.'.xperience the preceding species is far more abundant ; on the Continent this species 

 is much the commonest. 



LACCOPHILINA. 



This tribe contains two genera, Notomicrus represented by one species 

 from Madagascar, aud Laccoijhilus which comprises upwards of a hundred 



