PLATE I. 
neath, projected forwards, and bifid at the tip; horn 
of the head recurved, sub-emarginate on the back 
near the tip. 
Scarasaus Trryvus: thorace tricorni: intermedio 
maximo simplicissimo, capitis cornu 
recurvato simplicissimo. Amen. 
Acad. vol. 6, p. 391. 
This noble insect has been figured and described 
by various authors, whose works I have not yet 
had the good fortune to meet with. Gmelin, in his 
edition of the Syst. Wat., refers to Jablonsky, Gro- 
novius, Aubenton, Voet and Degeer for figures, 
and quotes also Fabricius’ Sp. Ins., his Mant. 
Ins., and the Amen. Acad.—the last of which only 
T have an opportunity to consult. 
The author of the * Centuria Insectorum,” pub- 
lished in that work, observes that it inhabits Penn- 
sylvania. 
It is, however, extremely rare in Pennsylvania. 
The late Rev. F. V. Melsheimer, the parent of 
entomology in this country, and a very industrious 
collector, found but two individuals im eighteen 
years. 
