120 THE CANADUN ENTOMOLOGIST. 



MoNOTAXis, n. gen. 



Palpi moderate, porrect, end member very small ; tongue strong ; 

 front scaled, quadrate, slightly protuberant; thorax and abdomen untufted; 

 fore tibise unarmed ; hind tibiae with two pairs of spurs, not swollen, with- 

 out hair pencil in ^ ; antennae unipectinate in ^ , pectinations long, end 

 simple, in $ unidentate ; fore wings even, rounded, without fovea in ^ 

 below, 2 accessory cells, 1 2 veins, 3 and 4 widely separate, 5 near middle 

 of cell, 6 at a point with 7 at end of cell ; hind wings 8 veins, without 

 fovea, vein 5 near middle of cell, 6 and 7 stemmed, 8 joined with cell 

 nearly its whole length. 



So far as I know the first American Geometer with unipectinate 

 antennae, though these are found in the Australian regions. But there the 

 form with 8 joining the cell in hind wings is extremely rare. I do not 

 consider it in anywise but as one of the HydrionienidcE, though it may be 

 placed in a subfamily by itself. 



MONOTAXIS SEMIPECTINATA, n. Sp. 



Expands 35-40 mm. Palpi and front dull black ; thorax dark mouse 

 colour ; abdomen lighter ; fore wings of a quite even dark fuscous, with 

 a mouse colour tinge, this deepening into a rather broad median band, 

 faintly indicating parallel wavy lines ; beyond this, first a white and then 

 four dark lines are indicated by fine dots of these colours on veins ; an 

 outer faint whitish line, mostly evident between veins, wavy ; marginal 

 line broken, blackish ; discal spots faint ; hind wings even mouse colour 

 fuscous, deepening outwardly. In the $ all the colours are the same, 

 but lighter fuscous, and without the mouse colour shading, but the single 

 specimen has an appearance as if faded. Beneath even mouse colour 

 fuscous, blackish on basal half along costa on fore wings, with some ochre 

 tinging near apex ; $ lighter. The whole insect has much the markings 

 of PJiilereine californiaia, Pack., and much the colour of that species 

 with the mouse colour shading added. 



Fort Grant, Ariz., July 23. In National Museum, No. 3928. The 

 female in my own collection from Arizona without definite locality, but 

 probably from either Prescott or Phoenix. 



Mycterophora slossoni^, n. sp. 



Expands 24 mm. Palpi black and fuscous mixed, nearly black 

 towards end ; front black tufted ; thorax fuscous ochre, mixed with black 

 in front, blackish behind ; abdomen blackish, interlined with fuscous ; 

 fore wings fuscous gray to fuscous, with a slight ochre tinge more or less 



