THE CANADIAN ENTOMOLOGIST 165 



distinct bciit. smoky, median line preceded by small discal dot; a crenulate 

 geminate t. p. line. Fringes on both wings rusty-brown in basal half, paler 

 outwardly. Beneath pale with distinct discal dots on all wings and the extra- 

 cellutar maculation of the upper side repeated very distinctly, the median 

 band being however absent. Expanse 20 mm. 



Holotype — 1 cf , Trenton, Ont., June 22, (J. D. Evans) in National Col- 

 lection, Ottawa. 



Allotype — 1 9, Trenton, Ont., June 15, (J. D. Evans) in National Collec- 

 tion, Ottawa. 



Paratypes— 1 c^ Hull, Que., June 20, and 19, Trenton, Ont., Aug. 3, 

 (Evans) in the same collection. 



The species has been probably confused in collections with obstipata Fabr., 

 but can be distinguished by the smiilarity of colour in the two sexes and by the 

 well-defined brown veining in the subterminal area. The genitalia (which are 

 figured) are quite distinct from those of obstipata. I take pleasure in naming the 

 species after the collector, Mr. J. D. Evans, one of the pioneer entomologists 

 of this country, whose collection is now incorporated in the Canadian National 

 Collection. 



Geometrinae. 

 Melanolophia centralis, sp. nov. 



Very similar to imitata Wlk. in colour and maculation but differing obviously 

 in cf genitalia. Primaries heavily sprinkled and shaded with purplish-brown 

 over a pale ochreous base. T. a. line deep purple brown, single, with two 

 prominent outward bulges, one in the cell, the other below cubital vein: median 

 line similar in colour, upright, arising from small costal blotch and with rather 

 prominent outward angle on cubitus; t. p. line indistinctly geminate, strongly 

 scalloped, the points resting on the veins, bent in below the cell and approached 

 to median line on inner margin, bordered outwardly by faint pale line beyond 

 which is diffuse dark shading; small "discal dot; s. t. line faint, composed of 

 series of dark dots, subparallel to outer margin, preceded by faint pale shades, 

 most prominent opposite cell and at inner margin: terminal area with faint 

 dark shade opposite cell; terminal series of black points: fringes concolorous. 

 Secondaries paler with traces of curved median and t. p. lines and distinct 

 subterminal row of dots. Beneath pale silky grey with minute discal dots on 

 all wings: costa of primaries and line at base of fringes slightly ochreous. Ex- 

 panse 40 mm. 



Holotype— 1 cf , J/emez Spgs. N.M., (Apr. 8-15) in Coll. Barnes. 



Paratypes — 6 d^'s, 1 9, Glenwood Spgs., Colo., (May) in Coll. Barnes 

 and in National Collection, Ottawa. 



The most readily recognizable structural difference between the present 

 species and imitata Wlk. is found in the male genitalia: in the latter species 

 what may be provisionally termed the harpe is composed of a heavy bunch of 

 subequal spines situated at the apex of the sacculus; this is modified in our 

 new species to one very long stout spine with a few small ones gathered around 

 its base. In connection with a study of the North American Boarmiids I hope 

 to publish at a later date figures of the genitalia of this and allied species. 



