ABABACTUS. 535 
but little longer than broad; the head is truncate behind, the hind angles a good deal 
less rounded, and the front of the thorax is also more truncate; the elytra are less 
elongate. The punctuation of the head and thorax is extremely indistinct. ‘The 
unique example is in a bad state of preservation, and, having no notch on the last 
ventral plate, is presumably a female. . 
3. Ababactus pallidus. 
Depressus, testaceus ; antennis gracilibus, articulis tertio ad octavum subinfuscatis ; capite crebre sat subtiliter 
punctato; prothorace parum elongato, subtiliter sat crebre punctato, medio longitudinaliter levigato ; 
elytris crebre subtilius punctatis, subnitidis. 
Long. 53 millim. 
Hab. GuatemaLa, San Gerénimo (Champion). 
Antenne very slender, elongate. Head subquadrate, but with the hind angles much 
rounded. LElytra a little broader and considerably longer than the thorax. The male 
has on the under surface of the fourth ventral segment two excessively minute black 
fascicles placed each in avery small circle, and on the terminal segment a small 
excision. 
Although closely allied to A. depressus this species is undoubtedly distinct, as besides 
being of a more pallid colour, it is rather broader, has much more slender antenne, 
shorter elytra, and a rather less dense punctuation, especially on the thorax. Three 
examples were obtained. 
4, Ababactus gracilis. (Tab. XIII. fig. 24.) 
Sublinearis, testaceus, plus minusve infuscatus, nitidus, pedibus pallidis ; capite prothoraceque parum punc- 
tatis, elytris sat crebre et fortiter punctatis. 
Long. 4 millim. 
Hab. Guatemata, Teleman in the Polochic valley (Champion). 
Antenne slender, moderately elongate; tenth joint a little longer than broad. Head 
narrow, suboval, somewhat sparingly but not finely punctate towards the front. Thorax 
very slender, only about half as broad as the elytra, very shining, obsoletely punctate, 
with a space along the middle impunctate. Elytra elongate and slender, rather darker 
in colour than the adjoining parts, somewhat coarsely punctate, shining, the punctuation 
behind obsolete. The male has a very minute circular depression on the middle of the 
fourth ventral segment, and a still more minute punctiform impression near the hind 
margin of the preceding segment; the terminal ventral plate has an elongate very 
narrow excision. 
5. Ababactus filarius. 
Sublinearis, rufus, prothorace elytrisque infuscatis; nitidus, pedibus pallidis ; capite prothoraceque sat crebre et 
fortiter punctatis, hoc medio longitudinaliter levigato; elytris elongatis, crebrius fortiter punctatis. 
Long. 4 millim. 
