160 Dr. Malcolm Burr’s Preliminary Revision of the 
Genus 1.— Pyragra, Serv. 
The genus Pyrayra, as thus restricted, contains three 
species, as follows:— 
1. Elytra unicoloria, fusca. 
2. Statura minore (18 mm.) ; forceps 
asymetricns.1. minor, Borelli. 
2.2. Statura majore (23 mm.) ; forceps 
symetricus.2. fuscxita, Serv. 
1.1. Elytra fulvo-vittata. 3. dohrni, Scudd. 
All authors are agreed in sinking Thermastris, Scudd., 
its type, 27i. hrasiliensis, Gray, being in my opinion, 
synonymous with Pyragra fuscata, Serv., the type of 
Pyragra ; I also agree with Rehn that Serville’s descrip¬ 
tion and figure of P.fnscata is perfectly clear, so that it is 
unnecessary to employ any other name; P. ckontalia, 
Scudd., and P. sanssurei, Dohrn, are only based on wing- 
coloration, and so I sink them as mere trifling variations 
of a con.mon and widely distributed species. 
I think it probable that the creature described by 
Rehn (1903^, p. 300), under the name of Rchinopsalis 
brevibractea, is an immature specimen of the same species. 
It extends from Mexico to Paraguay and appears to be 
common. Pyragra minor, Borelli, is a small species allied 
to P. fuscata, occurring in Costa Rica. 
Genus 2. — Propyragra, n. g. 
Differs from Pyragra in the almost rectangular transverse pronotum, 
which is not narrowed anteriorly. In the ^, the sides of the 6th 
and sometimes of the 7th, 8th, and 9th, abdominal segments are 
sharply pointed posteriorly, the line joining the points being carried 
along as a more or less distinct keel on the sides of the last dorsal 
segment, corresponding with the outside ridge of the forceps. In 
other respects it resembles Pyragra ; the penultimate ventral .segment 
of the male is ample, broad, the angles broadly rounded, and the 
posterior margin gently emarginate in the middle. The species are 
generally smaller than those of Pyragra. 
The type of the genus is Pyragra paragnayensis, Borelli. 
The apparently trivial feature of the coloration of the 
pronotum appears to be a constant feature. P. paraguay- 
ensis seems to be a southern form. P. brunnea is only 
known from Peru. P. buscJci is known from Jamaica and 
