30 _  RHYNCHOPHORA. 
The male has the base of the abdomen feebly sulcate, the apical edges of the elytra a 
little dilated, and each bearing an impression. of 
Hége procured sixteen specimens of this species, three only being males. 
19. Trachelizus geminatus, sp. n. 
Angustus, elongatus, rufo-ferrugineus, nitidus, sutura nigricante; prothorace subtiliter punctulato, sulco 
mediano fere integro, lateribus anterius subimpressis ibidemque setis erectis munitis; elytris fortiter 
punctato-sulcatis, seriei secunde punctatura omnino indisereta. 
Long. 10 millim. 
Hab. Mexico, Cerro de Plumas ( Hége). 
Although we have received only a single example of the male sex of this species, and 
it is exceedingly similar to 7. filiformis, I have no doubt it is distinct therefrom, and 
may be readily enough distinguished by the fact that next the suture the second groove 
is almost as destitute of punctuation as the first. The depression on the vertex is 
elongate-oval, not open behind, and not at all prolonged as a groove on to the meta- 
rostrum ; the prorostrum is deeply sulcate. The club of the antenna is elongate. The 
setae on each side of the thorax in front stand out so as to be visible from above. ‘The 
narrow interstices between the series of punctures on the elytra are a good deal raised. 
Beneath, the larger part of the prosternum is shining, the metasternum finely sulcate, 
the basal abdominal segments with an uninterrupted depression extending their whole 
length. ‘The lower face of the tips of the elytral margins are deplanate and impressed. 
20. Trachelizus optatus, sp. n. 
Angustus, dilute rufus, nitidus; prothorace parce, obsolete punctato, sulco mediano fere integro ; elytris 
seriatim fortiter punctatis, interstitiis haud elevatis. 
Long. 73 millim. 
flab. GuateMALa, San Gerdénimo (Champion). 
The only individual we have received of this species resembles, except in the punc- 
tuation of the elytra, a small example of 7’. ardwus; it is, however, distinguished by 
the fact that the serial punctures on the under surface of the head and rostrum do not 
cease at the pterygia, but are prolonged in front thereof to form an elongate, very 
fine groove, from which project numerous, very minute and short, sharp, stiff sete, 
these forming a sort of minute saw. In this last-mentioned character 7. optatus is 
allied to 7. serratus, the two species having, however, no resemblance in general 
appearance. ‘The impression on the vertex is elongate, not open behind. The thorax 
is narrow, dull at the sides, indistinctly, sparingly punctulate, the median sulcus 
attaining almost the front margin. The elytra have numerous series of large punctures 
separated only by somewhat narrow intervals. The prosternum is dull; the meta- 
sternum feebly sulcate. So far as the female is concerned, the species cannot be 
confounded with any of the varieties of 7. turgidirostris, because in that species there 
is no trace whatever of lateral grooves on the prorostrum. 
