XYLEBORUS, 217 
and I am more strongly of opinion than before that, in this case at all events, where the 
differences are better marked than those between X. torquatus and X. ladius, the 
inability to place certain individuals should not be held as a drawback to regarding 
the two forms as substantially distinct. 
The existence of X. affinis in the United States is doubtful, and has given rise to 
some discussion. Lichhoff’s original locality is given as the “ United States or Cuba,” 
which leaves the question open. At present it has not been clearly discriminated 
by American coleopterists from the other forms which are collectively known as 
aA. pubescens, Zimm.? (see Blandford, Ent. News, 1898, pp. 38-5). The species which 
usually passes in North America as X. pubescens is X. inermis, Bichh.; this does not 
occur among out specimens. | 
33. Xyleborus fuscatus, 
g. Xyleborus fuscatus, Eichh. Berl. ent. Zeitschr. 1867, p. 400°; Rat. Tom. p. 3862; Zimm. 
Trans. Am. Ent. Soc. 1868, p. 145°; Lec. Rhynch. N. Am. p. 8360‘; Hubb. U.S. Dep. Agr. 
Bull. 7 (N. 8.) 1897, p. 21, fig. 15°. 
3. Xyleborus planicollis, Zimm. Trans. Am. Ent. Soc. 1868, p. 145°. 
Hab. Nortu America, Atlantic States*®, Carolinal2, Virginia to Texas 4.— 
GuaTEMALA, Senahu in Vera Paz, El Tumbador, Guatemala city (Champion).— 
CoLomsia +2, 
Though no typical example has been accessible, it has been easy to identify the 
species from the description”, and the examples taken by Mr. Champion, one at each 
locality, agree entirely with those sent me from West Virginia by Mr. Hopkins as 
Eichhoff’s species. ichhoff’s description 2 contains an obvious mistake, not mentioned 
in the table of errata in his volume; compared with X. confusus, Eichh., X. fuscatus 
is said to be “magnitudine prope duplo minor.” The sizes quoted (X. confusus, 
2-3 millim.; X. fuscatus, 3 millim.) show this to be wrong. The latter insect is the 
larger and bulkier, and “ duplo major” was probably intended. 
The identification of X. planicollis, Zimm., as the male of this species has been 
made with tolerable certainty by Messrs. Hopkins and Schwarz, according to Hubbard >, 
who states that the breeding-galleries are excavated in many kinds of trees, chiefly in 
oak, hickory, and perhaps other hard woods, and also in wine-casks. 
34. Xyleborus confusus. 
9. Xyleborus confusus, Eichh. Berl. ent. Zeitschr. 1867, p. 401'; Rat. Tom. p. 8852. 
? Bostrichus ferrugineus, Boh. Kongl. Sv. Freg. Eugen. Resa, p. 88°. 
Xyleborus insularis, Sharp, Trans. Roy. Dubl. Soe. (2) iii. p. 193 (1885) ‘. 
Hab. Mexico, Jalapa, Acapulco in Guerrero (Hége), Toxpam (Sallé), Yucatan ?; 
British Honpuras, Belize, Rio Hondo (Blancaneaux); Guatemata, Cubilguitz, La 
Tinta, Chaco} and San Juan in Vera Paz, Coatepeque (Champion): Nicaraaua, 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 6, April 1898. Q2FF 
