COLYDIUM. 465 
Subfam. COLY DIINE. 
Basal joint of posterior tarsus much longer than the second; anterior acetabula closed behind; tibix more or 
less enlarged at the tip. 
This group comprises some elongate forms, and is closely approached by some of the 
Synchitine—such as Zasconotus—that have also closed anterior acetabula. The 
prosternal process arches under the coxe, and then is bent upwards behind them. 
This character distinguishes the group from the Deretaphrine, independent of the 
insertion and structure of the base of the antenne. | 
The Colydiine are distinguished by no good or constant character, either in Erichson’s 
system or in the present arrangement, from the Synchitine; and probably it will 
ultimately be found better to make the condition of the acetabula the point that shall 
decide whether a Colydiid belongs to the Synchitine or to the Colydiine; but this 
course cannot be adopted till a complete revision of the genera is made. The 
plan I formerly suggested of uniting the Colydiine with the Deretaphrine cannot, if 
attention be paid to the insertion of the antenne, be considered a proper one, as will be 
seen by a comparison of this character in a few forms (Tab. XIV. fig. 26a, head of 
Colydium; Tab. XV. fig. 13a, head of Sosylus). 
. COLYDIUM. 
Colydium, Fabricius, Ent. Syst. ii. p. 495; Erichson, Naturg. Ins. Deutschl. iii. p. 278; Horn, Proc. 
Am. Phil. Soc. xvii. p. 575. 
This well-marked genus includes at present about twelve species from the Western 
Hemisphere, and two European insects. To these we now add seven new species. The 
reference by Lacordaire of Jps monilis, Oliv., to the genus is a mere guess, and does 
not furnish sufficient evidence that Tropical Africa is included in the area of distribution 
of this genus. The extremely close resemblance of one of our species—C. chiriquense 
—to the European C. elongatum is a point of considerable interest. 
1. Colydium godmani, sp. n. (Tab. XIV. figg. 26,3; 26a, head from in 
front.) 
Robustum, subcylindricum, latum, nigrum, nitidum; antennis pedibusque piceis; prothorace parce punctato, 
nitido, tristriato, striis lateralibus evidenter abbreviatis; elytris ad basin vix costatis, sed costa secunda 
ante apicem altissime elevata, interstitiis nitidis tantum subtiliter punctatis. 
Long. 10 millim. 
Hab. Mzxico, Cordova (Sallé); Guatemata, Pantaleon, Zapote (Champion). 
Club of antenne elongate. Head broad, coarsely punctate; supra-ocular carina almost 
entirely absent. Thorax shining, the sides straight, just perceptibly narrowed. behind, 
front angles scarcely prominent; along the middle is a fine stria, which does not quite 
extend to the base or apex, at each side with a still more abbreviated stria. Hlytra 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, November 1894. 3 O* 
