96 HETEROMERA. 
2. Osphya pallida. 
Moderately elongate, shining, sparsely pubescent, above and beneath and the legs and antenne testaceous or 
yellowish-testaceous. Head finely and somewhat closely punctured; antenne (@ ) very long, extending 
to far beyond the middle of the elytra; prothorax strongly transverse, the sides rounded, scarcely more 
narrowed in front than behind, and very sharply margined, the margins reflexed, the base subtruncate but 
shallowly emarginate in the middle, the surface finely and somewhat closely punctured, the punctures more 
scattered on the disc; elytra more closely and roughly punctured than the prothorax; beneath closely 
and finely punctured. 
Length 54 millim. (9.) 
Hab. Guatemata, Cerro Zunil, Pantaleon (Champion). 
Two female examples. This species differs from O. tuberculiventris in its very much 
longer antenne, shorter and more sharply margined thorax, and much coarser and 
more diffuse punctuation of the upper surface. Both specimens are of a unicolorous 
testaceous colour. O. lutea (Horn), from California, is apparently an allied species. 
O. pallida has much the facies of the European Conopalpus testaceus, but is very much 
smaller than that insect. 
Group MYCTERIDES. 
MYCTERUS. 
Mycterus, Clairville, Ent. Helv. i. p. 124 (1798) ; Lacordaire, Gen. Col. v. p. 720; Horn, Trans. 
Am. Ent. Soe. vii. p. 339; Leconte & Horn, Class. Col. N. Am. p. 400 (1883). 
Ten species of this genus have been described, six from Europe or North Africa and 
four from the United States; one is now added from Mexico. They are found upon 
flowers in open places. 
1. Mycterus depressus. (Tab. IV. fig. 26, 9.) 
Elongate, depressed, rather narrow, piceous, the head in front and the oral organs reddish-testaceous, clothed with 
very short ashy pubescence, slightly shining. Head densely and very rugosely punctured ; antenne (2 ) 
stout, rather short, extending a little beyond the base of the elytra, fusco-ferruginous, the three basal joints 
and the apical one ferruginous, joint 3 nearly twice as long as 4, 4-10 decreasing in length but increasing 
in width, 10 about as long as broad; prothorax narrow, subquadrate, broadest at the base and there very 
much narrower than the elytra, a little broader than long, the sides feebly rounded and gradually narrowing 
from the base, the disc canaliculate towards the base and apex and with a broad shallow oblique impression 
on each side behind the middle, the impressions confluent at the base, the basal fovez distinct, the surface 
densely and rugosely punctured (more finely so than the head); elytra parallel to about the middle, the 
surface subcoriaceops, with widely scattered moderately coarse punctures arranged in very irregular rows, 
the flat interspaces shallowly, minutely, and closely punctured, the apices slightly pointed; beneath very 
densely punctured; legs entirely testaceous. 
Length 6} millim.; breadth 2 millim. (9.) 
Hab. Mexico, Villa Lerdo in Durango (Hége). 
One female example. This species is allied to the North-American Jf. quadricollis, 
Horn, an insect found upon the flowers of Agave in California and New Mexico; it 
differs, however, in several particulars from the two published descriptions of M. guadri- 
collis. MJ. depressus is more depressed than any other member of the genus known to 
me; the male doubtless possesses differently formed antenne. 
* 
