126 Proceedings of the Biological Society of Washington. 



The typical variety is common and generally distributed, the dates of 

 occurrence ranging from June 13 to Oct. 8. P. I. Variety semicrema Say 

 has been collected at Plummers Id., Md., Sept. 5, 1905, O. Heidemann ; 

 Oct. 1907, W. Palmer; Oct. 5, 1913, McAtee; July 12, 1914, L. O. Jackson; 

 near Chevy Chase Lake, Md., July 6, 1913, McAtee; Silver Hill, Md., Sept. 

 26, 1915, L. O. Jackson; near mouth of Four-mile Run, Va., Sept. 17, 1916, 

 McAtee, New Alexandria, Va., Oct. 1907, W. Palmer; and Washington, 

 D. C, June 17, 1906, D. H. demons. 



MICRUTALIS Fowler. 

 M. calva Say. — The only species occurring here exhibits two color 

 varieties : 



A. Pronotum, except apex, black var. calva. 



AA. Pronotum more or less pale along sides, the pale color encroaching on 

 the black so as to leave a peninsula of this color on posterior 

 part of pronotum var. illinoiensis. 



The typical variety is common, occurs in all parts of the region and has 

 been collected as early as June 15 and as late as Sept. 7. P. I. Variety 

 illinoiensis Coding has been collected at Silver Hill, Md., Sept. 26, 1915, L. 

 O. Jackson; Eastern Branch near Benning, D. C, Aug. 29, 1915, McAtee; 

 Sept. 13, 1914, L. O. Jackson; Veitch, Va., June 17, 1914, McAtee, and 

 Washington, D. C, Sept. 4, 1881. 



TELAMONINI. 

 Key to the Genera. 



A. Pronotum transversely rounded, without horn or crest. .Carynota p. 126. 

 AA. Pronotum with a distinct horn or compressed into a prominent 

 median crest or process. 

 B. Pronotum with a conspicuous forward projecting horn 



Thelia p. 127. 

 BB. Pronotum with an erect horn or crest. 



C. Pronotum with a narrow compressed horn, erect or 



nearly so, over the humeri Glossonotus p. 127. 



CC. Pronotal process not horn-like or if apparently so, 

 farther back than humeri. 

 D. Pronotal crest high and regularly arched 



Archasia p. 127. 

 DD. Pronotal crest not regularly arched. 



E. Pronotal crest rather narrow with a 

 distinct notch or step posteriorly 



Heliria p. 127. 

 EE. Pronotal crest usually broader, without 



step Telamona p. 127. 



CARYNOTA Fitch. 



C. mera Say.— Plummers Id., Md., July 5, 1912, H. S. Barber; June 17, 

 1913, J. D. Hood. 

 Apparently C. marmorata Say also may occur here. 



