394 SUPPLEMENT. 
_ Alcidion privatum (p. 157). 
To the localities given, add:—GuatemaLa, Volcan de Atitlan (Champion); PANaMa, 
Volcan de Chiriqui, Bugaba (Champion). 
All the examples from Guatemala and Nicaragua differ from those from the State of 
Panama in the centro-basal ridges of the elytra being very slightly elevated, but crested 
with a pencil of very long hairs. . Those from Panama have a strongly elevated com- 
pressed ridge fringed at the summit with very short hairs; these agree better with 
Pascoe’s description of A. privatwm from Santa Marta. In colours and markings the 
two forms offer no difference. 
The two forms may be separated as follows :-— 
A. privatum, Pascoe. 
Hab. Panama, Volcan de Chiriqui, Bugaba (Champion).—Sovutn America, Colombia. 
A. privatum, var. penicillare. 
Hab. GUATEMALA; NICARAGUA. 
In both forms the anterior tibiee of the male are bisinuous on their inner edge, with a 
more or less prominent tooth between the two sinuations. ‘This structure (observable 
in a less degree in other species of the genus) is seen in a still more developed state in 
A, brachiale, which is easily distinguishable from A. privatum by the short black oblique 
macular fascia behind the middle of the elytra. 
The scape in all three forms is very strongly flexuous beneath and hairy. 
Alcidion brachiale (p. 157). 
To the localities given, add :—GuaTeMaLa, El Tumbador (Champion); Panama, Volcan 
de Chiriqui (Champion). 
8. Alcidion lineatum. 
Alcidion lineatum, Bates, Ann. & Mag. N. H. ser. 8, xii. p. 105, nota’. 
Hab. Panama, Volcan de Chiriqui (Champion).—Souta America, Venezuela !. 
In this species the mesosternum is convex and carinated down the middle. 
XENOSTYLUS (to follow the genus Alcidion, p. 157). 
Gen. Alcidio subsimilis, sed differt antennis elongatissimis gracilibus, scapo valde elongato versus apicem clavato, 
articuloque 3°( ) subtus apice ramulo corneo emittente. Corpus elongatum, postice recte attenuatum, 
absque setis. Frons subplana; oculi magni, grosse granulati, lobo inferiori elongato-oblongo. Thorax 
inermis, transversus, lateribus post medium rotundatis. Elytra elongato-trigona, apice singulatim rotun- 
data, dorso a basi usque ad apicem declivi, carinula centro-basali parum elevata nuda. Antenne (¢) 
corpore duplo longiores, tenues, nudz ; scapo valde elongato longe ultra humeros attingente, subtus sub- 
flexuoso, sed intus versus apicem paullo dilatato ; articulo 3° quam cztera multo longiori, apice intus ( ¢ ) pro- 
cessu angusto torto, emittente ; 4°-11™ gradatim paullo crescentibus. Pedes sat elongati; femora pedun- 
