618 CATALOGUE OP 



ACKONYCTA SIMPLEX. 



Cinereo-alba ; caput nig ro fas datum ; untennce subserratce ; thoracis 

 tegula anticce nigro marginata ; abdomen subtestaceo-cine- 

 reum ; ala? antica? striga basali, tinea transversa cuneata,guttis 

 submarginalibus punctisque marginalibus nigris ; posiiccb 

 alba, litura discali nigricante, punctis exterioribus elongatis 

 punctisque paucis marginalibus nigris. 



Cinereous-white. Head with a black band in front. Palpi 

 porreet, very short, Antennae black, minutely serrated and setu- 

 lose. Fore tegulae of the thorax bordered with black. Pectus and 

 abdomen with a slight testaceous tinge, the latter extending some- 

 what beyond the hind wings. Tibia? black on the outer side ; tarsi 

 with black bands. Fore wings with a black basal streak, with a 

 very deeply undulating transverse black line, which forms lanceolate 

 curves, with black elongated submarginal dots and with black mar- 

 ginal points. Hind wings white, with a blackish mark in the disk, 

 with elongated black exterior points, and with a few black marginal 

 points. Length of the body 8 lines; of the wiugs|20 lines. 



Most like A. lepusculina and A. oblinita, but the fore wings 

 are much narrower than those of lepusculina, and the black marks 

 on the veins of the hiud wings distinguish it from oblinita. 



a. Vancouver's Island. Presented by Dr. Lyall. 



Genus DETUNDA. 



Mas. Corpus robustum. Proboscis brevis. Palpi longius- 

 culi, angulati ; articulus 2us oblique ascendens ; 3us porrectus, sub- 

 clavatus. Antennae subpectinatae. Thoracis tegula? posticae longae, 

 lanceolate. Abdomen alas posticas superans ; fasciculus apicalis 

 parvus. Pedes subpilosi; tibiae posticas calcaribus 3o 4oque parvis. 

 Alae margine exteriore subdentato; anticae apice rectangulatae. 



Male. Body stout. Proboscis short. Palpi as long as the 

 breadth of the head ; second joint obliquely ascending, fringed 

 beneath ; third porreet, subclavate, much shorter and more slender 

 than the second, with which it forms a nearly right angle. Antennae 

 slightly pectinated. Hind tegulae of the thorax long, lanceolate. 

 Abdomen extending rather beyond the hind wings ; apical tuft 

 small. Legs moderately stout, slightly pilose ; hind tibiae with four 

 spurs; first pair much longer than the second. Wings moderately 



