HYPOTHENEMUS. 227 
dissected was concerned. Even if the character is not diagnostic, the genus was well 
founded and unmistakably distinct at the time it was adopted, and may as justly 
be retained as certain named and undescribed genera of Erichson’s have been. In this 
respect it is in a different position from Monarthrum, Kirsch. 
The species of Hypothenemus are common in the tropics, but are little more than 
stragglers in temperate countries, to which they are frequently imported in seeds, &c. 
They are among the most difficult of Scolytide to distinguish or identify, a task that 
is almost impossible unless the examples are in good condition and not rubbed, as 
is often the case. We have received very few, though it is almost certain that a 
large number must exist within our limits. 
1. Apical margin of the prothorax with two prominent tubercles . . . . 2. 
Apical margin of the prothorax with several small tubercles. . . . . 3. 
2. Front of the prothorax with a narrow patch of a few large tubercles . . erectus, Lec. 
Front of the prothorax with a wider patch of numerous moderate-sized 
tubercles . 2. 1 ee ee ee ee ee ee we. valid, sp. 1. 
3. Prothorax and elytra densely clothed . . . 2. . 2. 1 ee ee A 
Prothorax and elytra subglabrous . . . . . 1. ee ee  Cdevigatus, sp. n. 
4, Elytra rather strongly striate. 2... 2. ee eee ee ee 
Elytra finely striato-punctate . . 2. . 2. 1 1 ee ee ee ee 
5. Form broad oblong, with short stiff sete . . . . . . . . . . «. plumerie, Nordl. 
Form narrow, subelongate, pulverulent . . . . . . . . © . . pulverulentus, Kichh. 
6. Prothorax uniformly convex, colour pitchy-black . . . . . . . = .« germari, Eichh. 
Prothorax nodose in the middle, rufo-testaceous, rarely infuscate . . . eruditus, Westw. 
1. Hypothenemus erectus. 
Hypothenemus erectus, Lec. Rhyncb. N. Am. p. 356'; Eichh. Proc. U. S. Nat. Mus. xviii. p. 608 
(1895) *. | 
Stephanoderes sculpturatus, Hichh. Rat. Tom. p. 146°. 
? Stephanoderes rotundicollis, Kichh. Rat. Tom. p. 145°. 
? Cryphalus striatulus, Mann. Bull. Mosc. 1853, p. 235° (apud Eichh. Rat. Tom. p. 147 *). 
Hab. Norta America® +, Tennessee 2, Texas !.—Mexico, Colima city (//ége) ; GUATE- 
MALA, San Gerdénimo (Champion). 
Although I have not seen a typical example of this species, I refer to it two specimens 
received by us, because they differ from /. dissimilis (Zimm.) (=. chapuisi, Hichh.) 
exactly as H. erectus is said by Leconte to differ—that is, the seriate hairs on the elytral 
interstices are replaced by very short hispid scales. Whether S. rotundivollis, Eichh., 
apparently described from a unique example *, be really distinct, seems problematical. 
Cryphalus striatulus, Mann.°, was conjecturally identified by Eichhoff* with the 
present species; it was founded on a single specimen from Alaska, and has not been 
recognized by later writers. 
2GG 2 
