100 . LONGICORNIA.. 
Mexico, one or two species only having as yet been detected in the north-western parts 
of South America. The head is very similar in shape to that of Teniotes; but the 
unarmed angles of the terminal ventral segment amply distinguish the genus. -Seventeen 
species are now known. 
1. Hammoderus spinipennis. (Tab. VII. fig. 7.) 
Hammoderus spinipennis, Thomson, Class. Long. p. 100 (1860)'; Bates, Trans. Ent. Soc. 1872, 
p. 198. | | 
Hab. Mexico 1, Cordova, Vera Cruz (Sallé); Nicaraeua, Chontales (Belt 2, Janson). 
2. Hammoderus thoracicus. | 
Teniotes thoracicus, White, Ann. & Mag. Nat. Hist. ser. 3, ii. p. 275 (1858)*. 
Hab. Mexico ’—Sovurn America?! 
According to the type specimen this species is very closely allied to H. spinipennis, 
but sufficiently distinct, the crown of the head having two divergent white lines and the 
lateral white lines being much broader than in H. spinipennis. 
3. Hammoderus albatus. 
HI. spinipenni affinis, rufescenti-fusco tomentosus, thorace maculis disci, elytris plagis difformibus (una maxima 
ante, altera minore post medium, tertiaque parva ante apicem) cretaceo-albis ; corpore subtus immaculato ; 
elytris apice utrinque dentiformibus haud distincte spinosis. 
Long. 123 lin. oO. 
Hab. Costa Rica, Cache (Rogers). 
Agrees with H. spinipennis and H. thoracicus in the immaculate base of the elytra; 
but it differs in the thorax wanting the short lateral line, and in having, instead, white 
spots or small patches in the centre of the disk. The spots of the elytra are also . 
different, although similar in position: they are of the purest white; and the ante- 
median spot forms a large irregular patch, more or less connected with smaller neigh- 
bouring spots; the postmedian and subapical spots differ only in being a little longer 
than in the above-named species. 
4. Hammoderus nitidus. (Tab. VII. fig. 8.) 
Hammoderus nitidus, Bates, Trans. Ent. Soc. 1878, p. 224’. 
Hab. Nicaragua, Chontales (Belt1). 
5. Hammoderus rubefactus. (Tab. VII. fig. 4.) 
Hammoderus rubefactus, Bates, Trans. Ent. Soc. 1872, p. 1997. 
Hab. Nicaragua, Chontales (Belt). 
