CRYPTOBIUM.—ABABACTUS. 533 
fortiter punctatis ; prothorace nitido, ad latera crebre irregulariter fortiter punctato, medio longitudinaliter 
levigato. 
‘Long. 6 millim. 
Hab. GuatEMALA, near the city, and San Gerdénimo (Champion) ; Panama, Bugaba, 
David, San Miguel in the Pearl Islands (Champion). 
Labrum with straight anterior margin, divided in the middle by a narrow definite 
notch, the angle on either side of which is very minutely prominent. Mandibles 
shorter than the head, each with two teeth. Antennze with the scape elongate, equal to 
the five following joints united ; joints 6-10 each a little shorter than the preceding one. 
Head not depressed, with convex eyes placed at the middle of the sides, rather coarsely 
and closely punctate, the punctuation extending nearly to the labrum. Thorax rounded 
at the front angles. Elytra very densely and rather deeply punctate, subrugose, but 
slightly shining. Hind body very finely punctured, dull. 
The male has a deep rather narrow excision at the apex of the last ventral plate; 
the female is without positive sexual characters. The species is allied to the Amazonian 
C. triste, Sharp ; though widely distributed in our region it is apparently not a common 
insect. It varies somewhat in the details of colour and punctuation: usually the hind 
margin of the wing-cases is picescent, or even more dilute in colour, and in some 
examples a considerable extent of the body is of this more dilute colour; the lateral 
punctuation of the thorax is sometimes divided so as to leave a more isolated and 
regular series of punctures on each side of the middle, and the head is in some examples 
not so densely punctured. 
A darkly-coloured example of the female sex is represented on the Plate. 
65. Cryptobium aberrans. 
Rufulum, opacum ; elytris nigris, capite superne abdomineque apicem versus nigricantibus, antennis in medio 
infuscatis, pedibus testaceis; capite anterius longiore, post oculos breviore, vertice subtruncato, obsolete 
punctato, anterius et in disco fere omnino impunctato sed haud nitido; prothorace minus gracili, elytris 
multo angustiore, lateribus leviter rotundatis, obsoletissime punctato, opaco ; elytris quam prothorax paullo 
longioribus, omnium densissime fere obsolete punctatis, opacis; abdomine ante apicem testaceo-cingulato. 
Long. 7 millim. 
Hab. Guatemata, Paso Antonio 400 feet (Champion). 
This is an aberrant species allied to the Amazonian C. scrobiculatum, Sharp, and with 
the labrum minutely denticulate on each side of the central incision in a manner similar 
to C. rostratum. Only a single example, without sexual marks, and presumably a 
female, has been obtained. 
ABABACTUS. 
Antenne graciles, fracte. Collum angustum. Labrum corneum, medio bispinosum, inter spinas divisum. 
Tarsi breviores, parum elongati, articulis 2°, 3°, 4° latitudine haud vel vix longioribus, articulo ultimo haud 
gracili, apicem versus crassiore, unguiculis parvis. 
