ART. 8. BUPRESTID BEETLES OF MEXICO—FISHER. 33 
PACHYSCHELUS DISCOIDALIS Waterhouse. 
Pachyschelus discoidalis WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, pp. 145-146, pl. 8, fig. 11. 
This beautiful rotund species was described from material collected 
by Mr. Champion at Volcan de Chiriqui, Panama, at an elevation 
of 3,000 to 4,000 feet. It is represented in the National Museum 
Collection by a single female collected at Zent, 20 miles from the 
Port Limon, Costa Rica, September 26, by Frederick Knab. 
PACHYSCHELUS MODESTUS Waterhouse. 
Pachyschelus modestus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, p. 147, pl. 8, fig. 14. 
The type locality for this species is Bugaba, Panama, and was 
described from material collected by Mr. Champion. Waterhouse 
also records a female from Volcan de Chiriqui, Panama, which has 
the purple color on the elytra more extended than in the type. There 
are no specimens of this species in the National Museum Collection, 
and it has been placed in the key from the characters given in the 
original description. 
PACHYSCHELUS AVERSUS Waterhouse. 
Pachyschelus aversus WATERHOUSE, Biol. Centr.-Amer. Coleopt., vol. 3, pt. 1, 
1889, pp. 146-147, pl. 8, fig. 13. 
This species was described from material collected by Sallé at 
Cordoba, Mexico. No specimens have been seen by the writer that 
will agree with the description given for these species, and its position 
in the key is based entirely upon the characters given in the original 
description. 
PACHYSCHELUS SUBOPACUS, new species. 
Male.—Broadly ovate, slightly longer than wide, more strongly 
narrowed behind than in front, subopaque, glabrous dark cyaneous; 
head and pronotum with a greenish tinge; elytra with a rather strong 
aeneous tinge on the disk; beneath piceous, more shining than above, 
with a feeble aeneous reflection. 
Head feebly convex and rather deeply embedded in the prothorax; 
front obsoletely, longitudinally grooved; surface sparsely but dis- 
tinctly punctate, with the intervals obsoletely granulated. Prono- 
tum moderately convex, four times as wide as long at the middle, 
much narrower in front than behind, widest at base; sides strongly, 
obliquely arcuate from base to apical angles, the edge strongly 
margined and apical angles rectangular; anterior margin deeply, 
arcuately emarginate; base nearly truncate, rather strongly sinuate 
at elytral lobes; hind angles acute, projecting slightly beyond the 
humeral angles of the elytra and fitting closely to them; surface 
glabrous, sparsely punctate, and very densely finely granuated, tho 
punctures large and distinct at the sides, becoming smaller and obso- 
