576 MONOTOMIDZ. 
thorax, an extremely minute free angle behind them. ‘Thorax about as long as broad, 
distinctly narrowed behind, rather finely punctate, a few punctures absent in front 
of the base, where there is no trace of a depression. Elytra with five series of fine 
punctures, obsolete towards the tip. Coxal lines not detached. Two specimens. 
5. Bactridium angustum, sp. n. 
Angustum, parallelum, deplanatum, piceo-rufum, elytris pallide testaceis ; antennis pedibusque rufis ; prothorace 
subtiliter punctato, ante basin transversim impresso ; elytris subobsolete, parce seriatim punctatis. 
Long. 2 millim. 
Hab. Guatemata, Senahu in Vera Paz, Guatemala city (Champion). 
Distinguished from the other species of the genus by its very narrow form, and by 
the diminished punctuation of the elytra. Head without a free angle behind the eyes, 
finely punctured. Thorax rather longer than broad, straight-sided, the hind angles 
rectangular, not prominent; the surface very finely punctured, transversely impressed 
in front of the base, but with only a very obscure smooth space before this. Elytra 
elongate, pallid, with series of very fine punctures which become obsolete behind. 
The male has a larger head than the female; the supplementary segment is very 
obscure. ‘Three specimens. 
6. Bactridium flohri, sp. n. 
Subelongatum, vix depressum, ferrugineum, nitidum ; prothorace subquadrato, ante basin impresso, subtiliter 
punctato; elytris subtiliter striatis, striis externis obsoletis. 
Long. 23 millim. 
Hab. Mexico, Motzorongo in Vera Cruz (Flohr). 
This little insect connects to a considerable extent the aberrant B. ewmorphum and 
B. germanum with the more ordinary forms of the genus. The ninth joint of the 
antenna is not at all enlarged, the club-joint is large. The head is rather large, finely 
punctate, and there are no free angles behind the eyes. The thorax is about as long 
as broad, straight at the sides, the hind angles rectangular, the lateral margin extremely 
fine; the surface rather finely punctate, with a small impression in the middle in front 
of the base, with only a very small indefinite smooth area before it. Striation of 
elytra unusually fine. Coxal lines detached and reaching to the hind margin of the 
first segment. One male. There is no abdominal fovea. 
Named in honour of the late Julius Flohr, whose decease has proved a serious loss 
to the progress of Coleopterology in Mexico. 
7. Bactridium rude, sp.n. (Tab. XVIII. fig. 5.) 
Robustum, haud depressum, piceum, pedibus antennarumque basi rufescentibus, subopacum ; prothorace fortiter 
punctato, ante basin impresso, dorso area impunctata; elytris crenato-striatis; antennis pedibusque 
crassis. 
191 31: 
Long. 24-33 millim. 
