42 Rev. A. Matthews's desa-qdions of Trichopteiygia. 



was found by JNIr. Blackburn under the bark of a tree near 

 Honolulu. 



Ohs. The genus Ptiliodes must be placed immediately before 

 Ptinella, from Avhicli it may be distinguished by its oblong 

 dejiressed form, quadrate thorax, and diverse formation of the 

 antennaj. I have not been able to examine its anatomy any 

 farther than a superficial view of the underside would permit. 



Ptinella Pacijica, n. sp. PI. II, fig. 4. 



L.c. ^-j^^ 1. = "75 — "87 mm. Elonguto-ovalis, sat depressa 

 sat nitida, obscure- castanea pills flavis sparse vestita ; capite 

 maguo lato; pronoto capite sat latiori fere pariter longo, tuber- 

 culis parvis remotis equidistantibus_ interstiisque nitidis leviter 

 reticulatis per totum ornato, atque impressione indistiucta in 

 disco notato, lateriluis marginatis valde rotundatis, ad media 

 litioribus, angulis posterioribus sat obtusis; elytris capite atque 

 pronoto sat longioribus vix latioribus, pone media latioribus, 

 sat fortiter asperatis, apicibus latis valde rotundatis ; pcdibus 

 atque antennis longis robustis la^te flavis. 



Head rather short, much rounded in front, shining, closely 

 reticulated, with a few distant minute tubercles; eyes small and 

 prominent, antenna? long, robust, bright yellow. 



Thorax moderate, as long but broader than the head, orna- 

 mented with minute remote and equidistant tubercles, with the 

 interstices shining, finely and closely reticulate, sides margined 

 and much rounded, with all the angles rather obtuse, there is a 

 faint impression on the disc, which may have been accidental. 



Scutellam moderate, triangular, rather long, deeply asperate. 



Eli/tra rather long, as long and as wide as the head and 

 tliorax, widest behind the middle, rather deeply asperate in 

 irregular transverse rows, with tlic interstices shining and finely 

 reticulate, apices much rounded, with the extreme edge pale. 



Abdomen with five segments exposed, apex obtuse and pale. 



Legs long, bright yellow. 



J'^nder parts castaneous, with the mouth and apex of the 

 abdomen yellow. 



Differs from all its congeners in the large size and rounded 

 form of the thorax. 



Two examples of this species were foiuul by Mr. Blackburn 

 under the bark of a tree on the moiuitains near lionolidu. 



