1892] MARYLAND ACADEMY OF SCIENCES. 165 



it is narrowed at base, broadly rounded on the outer 

 corners, and liardly emarginated on the apical margin ; 

 inferior genital sheath long, moderately narrow, wrinkled 

 and hairy. Opercles yellow, widely emarginated on the 

 outer side, with a long black spot exteriorly; the mera- 

 canthi long, auriculate, curved inwards; the tympani of 

 medium si/e, thick texture, exposed, and placed latero- 

 superiorly. Length to apex of abdomen 20-24; expanse 

 of wing-covers 59-66; and width of base of pronotum 

 92-11 millims. 



Only males have yet been examined. Specimens have 

 thus far proved scarce. This curious species was dis- 

 covered in the vicinity of »San Diego, Cal., May 10-11, 

 by Dr. F. E. Blaisdell,.of Coronado, to whom the species 

 is dedicated as a small token of the esteem in which his 

 entomological zeal is held by the writer. 



The peculiarity of the venation of the radial and 

 adjoining cells might suggest the idea of giving 

 characters for a new genus, but all the other elements of 

 structure accord so closely with Tihicen that no sufficient 

 reason seems to be foresent for making the separation. 

 Through the elongation and expansion of these cells a 

 close relation with Platypedla is suggested. 

 8. T. ca7ia<:Ze/i.s/s Provancher. (C'/cafZ«.) Naturaliste Canad. 

 Cicadides 1889, p. 213, No. 3. 



From the Province of Quebec. The description 

 suggests a possibility of this being a synonym of T. 

 striatipes Hald. But without actual examination of the 

 specimen no satisfactory statement can be made. The 

 description cited is almost worthless. 



MELAMP8ALTA Kolenati. 

 M. parvula Say. {Cicada,) Journ. Acad. Philad. 1825, 

 vol. 4, p. 333, No. 5, Cicada pallescens German. Thon. 

 Entom. Archiv. 1830, vol. 2, p. 8, No. 93. Cicada 

 Calliope Walk. Brit. Mus. List. Hom. vol. 1, p. 212, 

 No. 165. 



