March, igi;.] CoLE : OsTEN SaCKEn's GrOUP " PceCILANTHEAX." 67 



5. Palpi close-scaled and closely upturned to middle of front, 

 the third joint sometimes porrect in death; scales rather 

 narrow as in Entephria, with obscure wave-markings on 



fore wing, §37 indefinata. 



5. Palpi moderate, rough, beaklike, hind wings more distinctly 

 scalloped, scales normal, §38. 



neomexicana, australis, etc.2 

 4. Small, brown with many nearly straight transverse lines, outer 

 ■ margins even ; no coremata. 



Percnoptilota (?) multiferata. 



The following papers contain keys to the genera of Hydriomen- 

 inse : 



Meyrick, E. : A monograph of the New Zealand Geometrina, Trans. N. Z. 



Institute, 16, 49, 1883. This is the fundamental paper on which our 



present classification is based. 

 Meyrick, E. : Revision of Australian Lepidoptera, IV, Proc. Linn. Soc. New 



South Wales (2), 5, 791, 1890. 

 Meyrick, E. : On the Classification of the Geometrina of the European Fauna, 



Trans. Ent. Soc. Lond., 1892 (i), 53, 1892. 

 Hampson, G. F. : The Fauna of British India, Moths, III, 329, 1895. 

 HuLST, G. D. : A classification of the Geometrina of North America, Trans. 



Am. Ent. Soc, 23, 245, 1896, 



NOTES ON OSTEN SACKEN'S GROUP " PCECILAN- 

 THEAX," WITH DESCRIPTIONS OF NEW 

 SPECIES. 



By Frank R. Cole, 

 Washington, D. C. 



The species in this group of Bombyliidse are very difficult of char- 

 acterization and it may be that some of the described species are local 

 varieties or races. I have had a good series of most of the species 

 to work with. Mr. Knab loaned the National Museum collection 

 in this group which made up a large part of my material, and 

 Mr. Banks and Mr. Walton have loaned me specimens. In the prep- 

 aration of this paper I am greatly indebted to Mr. Banks for compar- 



5 Scotosia gobiata of New Zealand would run here and may really be 

 related. 



