Do 
MONOTOMIDé. 56 
11. Silvanus advena. 
Cryptophagus advena, Waltl, Faunus, i. p. 169 (1832) °. 
Cathartus advena, auct. 
Hab. Mexico, Teapa (H. H. Smith); GuatemaLa, Duefias, Chiacam (Champion) ; 
Nicaragua, Chontales (Janson): Panama, Volcan de Chiriqui (Champion).—ANTILLES, 
Grenada. 
12. Silvanus quadricollis. 
Silvanus quadricollis, Guérin, Icon. Régne Anim., Ins. iii. p. 198°; Casey, Trans. Am. Ent. Soc. 
Xl. p. 72, t. 4. tig. 5°. 
Cathartus quadricollis, Reitter, Col. Hefte, xv. p. 128°; Champ. Trans. Ent. Soc. Lond. 1898, 
p. 406 *. 
Hab. Nortu America | ?.—MeExico, Motzorongo (floAr), Campeche (Sallé) ; 
GuaTEMALA, Senahu, Zapote, Cerro Zunil, Capetillo (Champion) ; Nicaragua, Chontales 
(Janson) ; Panama, Volcan de Chiriqui (Champion).—ANTILLES, St. Vincent and 
Grenada ¢. 
13. Silvanus excisus. 
Cathartus excisus, Reitter, Col. Hefte, xv. p. 128°. 
Hab. GuateMaia, Zapote (Champion).—East Inpies!; Europe !. 
Fam. MONOTOMIDA*. 
This is a small group of Coleoptera consisting of somewhat less than 100 species. 
On a preceding page (p. 500) I intimated my opinion that at least a part of this family 
should be placed in Cucujide. Since then Dr. Ganglbauer, though not acquainted 
with my statement, has treated Monotomide as a subfamily of Cucujide. My recent 
study quite confirms this view, and also convinces me that the Hwrops-forms are 
really allied to Monotoma proper, notwithstanding the great difference in superficial 
appearance. 
The subfamily Monotomine is also undoubtedly allied to Rhizophagine, and is 
connected therewith to a certain extent by the interesting genus Anewrops, described 
below. The two subfamilies remain distinct, as the Rhizophagine have antennal 
grooves on the underside of the head, and their anterior acetabula are strongly 
transverse. 
Upwards of thirty species are recorded in the following pages. Of this number only 
five have been previously described. Of all of the latter I have seen typical specimens, 
M. René Oberthiir having been so kind as to communicate to me the series of Reitter’s 
types of Mexican Monotomide. 
* By D. Suarp. 
4 C* 2 
