COLEOPTERA 215 



(3) Colpocacciis lanaicnsis, sp. nov. 



Niger, prothorace picescente, antennis, palpis pedibusque fiavis, elytrorum margine 

 inflexa ferruginea ; thorace transverse, angulis posterioribus obtusis, sat argutis ; elytris 

 minus leviter striatis. Long. corp. 8 — 9 mm. 



Very closely allied to C. hatvaiiensis, but darker in colour, with the legs paler 

 (being nowhere infuscate), and with the thorax more transverse and less rounded at 

 the posterior angles. 



These characters distinguish satisfactorily a large series of about 70 examples 

 from Lanai. In addition, I assign to the same species a small series from Molokai and 

 Maui (nine or ten examples from each island). The specimens from these two islands 

 have the thorax decidedly a little narrower, and have not the shape of this part so 

 characteristic as in the Lanai specimens. But I am not able to detect anything to lead 

 me to suppose that they belong to a really separate form. 



Hab. Lanai, Maui, Molokai (Perkins). Lanai, 2 — 3000 ft., in January, June and 

 July. Molokai mountains in August. West Maui mountains, 4000 ft., in April. 



(4) Colpocacats apicalis, sp. nov. 



Pusco-ferrugineus, nitidus, capite elytrisque nigricantibus, his subtiliter striatis, 

 limbo ad apicem late testaceo. Long. corp. 8^ — 9 mm. 



Closely allied to C. hazvaiiensis, but readily distinguished by the broadly yellow tip 

 of the elytra : it is also a somewhat broader insect, with more transverse thorax. From 

 C. posticatits it can be known at a glance by the delicate striation of the elytra. Most 

 of the small series of specimens are immature. 



Hab. Hawaii, Perkins and Koebele. Kilauea and near Hilo in August, appa- 

 rently rare. 



(5) Co/pocaccns posticatns, sp. nov. 



Piceus, minus nitidus, antennis palpisque pedibusque flavis ; elytris limbo late ad 

 apicem testaceo, profunde striatis ; corpore subtus variegato. Long. 7 — 8 mm. 



Easily distinguished from all the other species except C. niarginatus by the deep 

 striation of the elytra. The colour Is a little variable, but is less pigmented with black 

 than any of the other species. The thorax is strongly transverse, and the posterior 

 angles are sharply marked, though slightly obtuse. 



Hab. Kauai, Perkins. Koholuamano in April. Mts. W'aimea in May. Rare. 



(6) Colpocaccus marginaitts, sp. nov. 



Piceus, antennis, palpis pedibusque flavis, elytris anguste ferrugineo-marginatis, 

 profunde striatis ; corpore subtus variegato. Long. corp. 8 mm. 



F. u. III. 28 



