251 
of the Group Cerambycinae. 
prothorax and their truncated elytra. Trirachys , Hope, is 
the most nearly allied genus, but in this the prothorax is 
furnished on each side with a conical spine ; the third to fifth 
joints of the antennae in the male are distinctly (the sixth 
minutely) spined at their outer apex, and the remaining 
joints are unarmed. 
The species of the present genus have up to now been 
placed in either Neoceramhyx or Pachydissus , and a good deal 
of confusion exists in their nomenclature. The following 
synopsis of their characters may prove useful : — 
§ A. Prothorax strongly and more or less 
regularly transversely wrinkled. Disk 
usually without a central smooth space. 
Antennae distinctly spined in both sexes. 
Pronotum with two well-marked longitudinal 
slightly oblique impressions. Intermediate 
and posterior femora denticulately produced 
on each side at their apex 
Joints of the antennae in the male almost 
without spines at their outer apical termina- 
tion. Pronotum with two rather faint longi- 
tudinal impressions. Femora without teeth 
at their apex 
Antennae in the male without spines at the 
outer termination of the joints, with the scape 
very feebly rugose. Pronotum without lon- 
gitudinal impressions on the disk or with but 
the faintest trace of them. Femora without 
teeth at the apex 
§ B. Prothorax more or less irregularly 
wrinkled above. Usually with a central 
smooth space. 
Form broad and robust. Intergenal groove 
directly transverse or very feebly bisinuate. 
Pronotum with two obliquely longitudinal 
impressions, limiting a central smooth space. 
Apices of elytra quadrispinose 4. JE. ampliata y sp. n. 
Intergenal groove strongly bowed back- 
wards. Pronotum with two obliquely longi- 
tudinal impressions, limiting a central smooth 
space. Apices of the elytra spinose at the 
suture, dentate externally 5. AH. induta , Newm. 
As in the preceding, but with the apices of 
the elytra briefly quadrispinose 6. AJ, textor , Pasc. 
Intergenal groove strongly bowed back- 
wards. Pronotum without longitudinal im- 
pressions, but with a small transverse smooth 
space behind the middle. Antennae ( <$ ) less 
than twice the length of the body 7. AL. perplexa , sp. n. 
1. AL. aurifaber } White. 
2. sE, achilleSy Thoms. 
3. AS. Maria, Thoms. 
