OF WASHINGTON, VOLUME XVIII, 1916 125 



breeding observations on colonies of larvae as well as adults are 

 needed. One of the better marked forms which is probably spe- 

 cifically distinct but which is assigned here awaiting more data, is 

 more convex than the common form, has a narrower more decli- 

 vous and opaque expanded margin, usually displays one or three 

 maculae on each elytron and has coarser elytral sculpture. A 

 Cincinnati specimen in the Dury collection was- determined by 

 Dr. Geo. Horn as C. bisignata Boh. but the description does not 

 quite fit the series examined by me, the localities of which are, 

 Chicopee and West Springfield, Mass. (Apr. 1884 and June 1898, 

 Knab, 4 examples), Dayton, Ohio (July 22, 1905, Dury), Douglas 

 Co., Kans. (Snow, 8 examples), Onaga, Kans. (Crevecoeur, 2 

 examples) and Texas (Belfrage). The anterior claw of the 

 middle feet in the male lacks the basal tooth and is more strongly 

 asymmetrical than in the other forms I have left under the name 

 bicolor. 



26. Metriona emarginata (Boh.) is recorded from Arizona 

 but without definite locality indicated. Three specimens in the 

 Knab collection were received from Schaeffer labelled Huachuca 

 Mts., Ariz., July 25, 1905. 



27. Metriona purpurata (Boh.) represented in the National 

 Collection by specimens from Maine to Montana, Utah and 

 Texas, seems to have been neglected biologically, for no record of 

 host plant is at hand, except that the writer is informed by Mr. 

 Knab that it breeds on wild morning-glory in Massachusetts. A 

 specimen of very different habitus, labelled "Fla., Coll. O. Dietz" 

 is in the Schaeffer Collection. It is larger, more depressed and 

 more highly colored than the northern specimens and if the lo- 

 cality is authentic it must represent a distinct local race which 

 greatly extends the habitat of the species. 



28. Metriona profligata (Boh.) has been cited by Schaeffer 

 1905 (Sci. Bull. Brook. Mus., vol. I, p. 174) from Arizona as occur- 

 ring commonly on low weeds and branches of various trees. Speci- 

 mens kindly given to the National Collection by him are labelled 

 Huachuca Mts. June 16 and 27. Other specimens are from the 

 Chiricahua and Santa Rita Mts., Arizona (May 20, June 13 

 and July 3, Hubbard and Schwarz) and Las Vegas Hot Springs, 

 N. M. (Aug. 11, 1901 Schwarz). 



29. Ctenochira bonvouloiri (Boh). This Mexican species is 

 mentioned by Horn 1894 (Proc. Cal. Acad. Sci. (2), vol. 4, p. 344) 

 from two localities in Lower California and three examples are 

 in the National Collection from Brownsville, Texas. 



The following admittedly imperfect key to our species does not 

 emphasize the recently proposed generic characters but is added 

 in the hope that it will be of assistance to some who have not 

 access to large collections or to better literature. 



