378 SUPPLEMENT. 
There is no difference between this species and S. melanogenys except in colour, the 
head and median area of the elytra being hoary white in S. senex, and tawny brown like 
the rest of the surface in S. melanogenys. The Chontales specimen I referred (ante, 
p. 188) to S. melanogenys is nearly intermediate between the two forms, having the 
forehead of lighter colour than in South-American specimens. 
5 (a). Steirastoma liturata. (Tab. XXIII. fig. 5.) 
S. stellioni affinis et similis, sed differt S. signaturis nigris tenuioribus, etc. Minor et gracilior, albo-cinerea, 
elytris guttis suturalibus et marginalibus fasciisque (plus minusve interruptis) tenuibus valde undulatis, 
nigris; thorace carinis tribus parallelis; elytris apice oblique breviter truncatis, angulo exteriori acute 
dentiformi, carina dorsali mediocriter flexuosa basi granulata, versus humeros sparsim plerumque lineatim 
granulatis; ventre medio nigro nitido; antennis articulis 3°-7™ apice fuscis; scapo pyriformi-clavato, 
articulo 3° subtus fere usque ad apicem spinuloso. 
Long. 53-7 lin. ¢ 9. 
Hab. Guavemana, Torola (Champion). 
ACANTHODERES (p. 139). 
Acanthoderes rubripes (p. 139). 
To the locality given, add :—Panama, Volcan de Chiriqui, Bugaba (Champion). 
Acanthoderes bivitta (p. 140). 
To the localities given, add :—Panama, Volcan de Chiriqui, Bugaba (Champion). 
Acanthoderes lugens (p. 140). 
To the locality given, add :—Muxtco, Almolonga, Tehuacan (ge). 
Examples in the Sallé collection, evidently correctly named, show that this species 
(so insufficiently described by its author) belongs to the group of less elongated sub- 
trigonal species, which have a flexuous dorsal carina (like the Steirastome), and narrow 
sinuate-truncate elytral apices. It is distinguished from other described species of its 
group (except from A. sylvanus) by the compact yellowish-white tomentum which 
clothes its square flat forehead; the elytral carine diverge, and become a little more 
elevated towards the base, and are there granulate-tuberculated ; a few much-scattered 
granule are seen also between the carine and the shoulders. The colour of the elytra 
is lightish brown, becoming ashy brown towards the suture, and much spotted with 
dark brown; there are also three or four lateral much-angulated dark-brown fascie or 
patches, but no distinct whitish fascia. It ranges insize from 6 to 9 lines. The meso- 
sternum in front is subvertical, with a tubercle on each side of the edge of the declivity. 
Acanthoderes sylvanus (p. 141). 
To the locality given, add :—GuatemaLa, Purula (Champion). 
The broad oblique ashy white fascia is sometimes narrow and broken, or even quite 
