Hydrophilidce of New Zealand. ill 



Cyloma thomsonus, n. s. 

 Oralis, convexus, parum nitidus, nigcr, antennarum basi palpis- 

 que sordido tcstaceifi, elytrorum apico late maculaquc Immerali 

 flavis; supra crebre aeqiaaliter punctatus, et in elytris praeterea 

 seriebus punctorum majorum. Long. 4^ mm., lat. 2| mm. 



The very large yellow apex of, and the conspicuous 

 humeral spot on, the elytra render this distinguishable 

 at a glance ; the apical yellow spot runs forward along 

 the lateral margin near the base, and in some examples 

 reaches the humeral spot. The elytral series of punc- 

 tures are very distinct, and are of about uniform coarse- 

 ness throughout, except that the two next the suture are 

 much finer, and that the sutural is deepened into an im- 

 pressed stria behind. 



I have long had a small series of this species from an 

 old collection in my possession, and have recently 

 received an example from G. M. Thomson, Esq., of 

 Dunedin, confirming it as beyond doubt a New Zealand 

 insect. 



Cyloma guttulatus, n. s. 



Ovalis, convexiis, testaceis, capitis thoraceque medio elytrisque 

 fuscis, his sutura margineque externo testaceis, ad basin et ante 

 apicem guttulis albidis numerosis, abdomine nigricantc. Long. 

 8 mm., lat. 1^ mm. 



Head very densely punctate, yellow at the sides, broadly fuscous 

 or piceous along the middle. Thorax rather spariugly and finely 

 punctate on the middle, at the sides with numerous coarse punc- 

 tures mixed with the finer ones. Elytra each with ten series of 

 coarse punctures extending from base to apex, the interstices almost 

 impunctate, except near the suture ; they are broadly testaceous at 

 the apex, along the outer margin, and the suture, so that a large 

 patch on each is left dark ; and at the base there are numerous 

 spots, some larger, some smaller, of a whitish or ivory colour ; and 

 there is another transverse series of similar marks behind the 

 middle. The legs and antennae arc yellow, the club of the latter 

 being a little infuscate ; the tarsi are short. 



Greymouth ; a single individual sent by Mr. Helms 

 with a large number of Adolojnis kehnsi, and passed over 

 at the time by me as an immature example of that 

 species. 



