JOURNAL 



JOffD Dgorh €!nl'onioIogirfiI KoriFfg. 



Vol. XVIII. DECEMBER, 1910. No. 4. 



NEW SPECIES AND ONE NEW GENUS OF 

 GEOMETRID^. 



By John A. Grossbeck. 



New York City. 



(With Plate VI.) 

 In the early part of the present year the writer was engaged in 

 the rearrangement of Dr. Wm. Barnes' collection of North American 

 Geometridae which is stationed at his home in Decatur, Illinois. This 

 collection is undoubtedly the largest of its kind in the United States, 

 not excepting that in the National Museum, which, however, is richer 

 in types. Among the material studied were many new species, a 

 few of which are described in the present paper. The remainder of 

 the material will be worked up as opportunity serves, though perhaps 

 only in connection with the groups to which the species respectively 

 belong. 

 I. Mesoleuca interrupta, new species. 



Expanse, 20-21.5 mm. Palpi, head and thorax pale yellowish, the central 

 portion of the front, vertex at base of antennje and thorax at insertion of 

 primaries dark brown. Antennae beneath, brown or yellowish, above marked 

 alternately with brown and white. Abdomen above, whitish, dusky on central 

 segments, with brown central spots which tend to disintegrate laterally, last 

 segment brown with central white stripe, anal brush yellowish ; beneath, en- 

 tirely yellowish. Primaries white, more or less profusely dusted over with 

 dusky scales. Basal line about one-fifth out, white, rather narrow, sharply 

 angulated on cubital and anal veins. Intradiscal line crosses less than one-half 

 out, white, quite broad, somewhat irregular in its course but on the whole curved 



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