350 SUPPLEMENT. 
species of Rosalba, bearing very little resemblance to that of Alcidion, to which 
Thomson compares it, so that the two may be distinct, though nearly allied genera. 
Aletretia and Amphicneia have the greatly elongated claw-joint and sinuated middle 
of the outer edge of the middle tibiee which distinguish the Hippopsini, but the form 
of the head is nearer that of the Ataxiini. They constitute, in fact, transition forms 
between the two groups. 
1. Aletretia pulchra. (Tab. XXII. fig. 11.) 
A. inscripta multo major, castaneo-fusca ; thorace vittis quinque, elytris lineis plurimis versus basin et apicem 
fasciaque obliqua latiori mox post medium, ochraceis; thorace cylindrico, medio dorso convexo punctato, 
tuberculoque parvo laterali; elytris subcylindricis, apice oblique truncatis, angulo exteriori dentato, carina 
utrinque contra-basali valida sed obtusa, pone has depressis, crebre punctatis, dimidio apicali levi; pedibus 
elongatis, tibiis intermediis extus medio sinuatis; tarsorum articulo unguiculari longissimo. 
Long. 53 lin. 
Hab. Panama, Bugaba (Champion). 
ACESTRILLA (to follow the genus Asyngenes, p. 115). 
Gen. Asyngeni affinis; differt inter alia oculis divisis, subtilius granulatis. Corpus minutum, undique longe 
setosum, politum nec tomento indutum. Caput inter antennas concavum; frons convexa; oculi sub- 
tenuiter granulati divisi, lobo inferiori rotundato, convexo. Thorax relative elongatus, cylindricus, 
mediocriter convexus, basi paullo constrictus, grosse confertim punctatus, spina brevi laterali post medium. 
Elytra anguste oblonga (thorace latiora), dorso antico depressa, apice rotundata. Prosternum antice 
mediocriter elongatum, inter coxas parum arcuatum, acetabula extus late angulata. Mesosternum sub- 
planum, acetabula clausa. Pedes breves, sat tenues; tibiae intermedia medio longe sinuate. Tarsi 
breves et angusti, articulo unguiculari ceteris conjunctis subequali, sed basi tenui; unguibus subdiver- 
gentibus. 
Antenne ¢ corpore dimidio longiores, filiformes undique longissime pilosi; scapus mediocris, gradatim clavatus, 
basi intus haud sinuatus; articulus 3"* quam 4"* paullo breviori, 4°-11™ subsequalibus vel parum decres- 
centibus. 
A member of a numerous and difficult subgroup of small Lamiide allied to Estola, 
Eupogonius, and Pogonocherus, distinguished by the lateral armature of the thorax 
consisting of a short spine. It agrees with Asyngenes in the claws not being at right 
angles to the tarsi, but they are far from having the same form and position as 
in the Niphonini. 
1. Acestrilla minima. (Tab. XXII. fig. 12.) 
Nigra, nitida; elytris utrinque vitta latissima a basi usque ultra medium extensa, castaneo-rufa; corpore supra 
et subtus (Jateribus) sat grosse sed discrete punctato ; elytris medio punctis seriatis. 
Long. 17 lin. 
Hab. Guaremata, Panima in Vera Paz (Champion); Panama, Volcan de Chiriqui 
(Champion). | 
One of the smallest species of Longiccrnia known. In the single example from 
