LONGICORNIA. 257 
2. Spherionillum quadrisignatum. (Tab. XVII. fig. 21.) 
Angustius, thorace elongato-ovato, basi longius angustato, toto (spatio angusto mediano excepto) argenteo- 
tomentoso; elytris utrinque maculis flavo-testaceis duabus, prima ante medium versus marginem valde 
angustata, secunda post medium angusta fascisxformi, apice recte vel sinuatim truncatis, angulo suturali 
breviter producto, exteriori longe spinoso. Ceteris sicut in S. pictum. 
Long. 5-6 lin. ¢ @. 
Hab. Mexico, Cordova (Sallé), Paso del Macho (Hége). 
ECTENESSA. 
Gen. Peribai speciebus tenuioribus similis, sed adhue gracilior antennisque muticis. Corpus sublineare, setosum. 
Tubera antennifera parum elevata. Palpi valde inaquales, articulo ultimo late triangulari. Antenne 
graciles, ¢ corpore dimidio longiores, inermes, infra parum dense ciliate, articulo 4° elongato, preecedenti 
et sequenti parum breviori, 3°-6™ vel 3°-7™ subtiliter interdum vix perspicue carinatis. Thorax elongatus, 
cylindrico-ovatus, inermis vel subinermis, dorso depresso et calloso, callo utrinque prope basin paullo 
altiori. Elytra postice attenuata, apice spinosa. Pedes elongati, graciles; femora abrupte clavata et longe 
pedunculata; tibiee postice carinate. Prosternum inter coxas angustissimum ; cox subglobose paullo 
exserte ; acetabula clausa. 
A genus of mixed structural characters, which will not fall into any of Lacordaire’s 
groups, and appears equally allied to his Spherionides, [bidiontdes, and Calliopsides. 
Besides the following Mexican species three are known to me from South Brazil, which 
differ from the type in their subopaque surface and less pronounced dorsal elevations 
(opaque like the rest of the surface) and in the feebly tuberculated sides of the thorax *. 
* For the better understanding of the genus the three species may be here described :— 
Ectenessa subopaca. 
Fulvo-testacea, subopaca, passim sed sparsim longe setosa; antennis ( ¢ ) versus basin paullulum crassioribus, art.. 
°_6™ valde carinatis ; thorace alutaceo, subtiliter incumbenti-pubescenti, utrinque medio tuberculo minuto 
acuto, callis subbasalibus conspicuis, ceteris vix elevatis; elytris passim discrete punctatis, dorso equaliter 
depressis, apice oblique sinuato-truncatis, angulo exteriori longe producto. 
Long. 54 lin. 
Hab. Parana (Provincia), South Brazil. 
Ectenessa phthisica. 
Pallide flavo-testacea ; capite thoraceque rufo-testaceis, opacis, haud perspicue sculpturatis, hoc tuberculo laterali 
+ minuto acuto; antennis et tibiis posticis subtilissime subobsolete carinatis; elytris apice latius transversim 
truncatis, angulo suturali acuto exteriori longius spinoso, dorso utrinque medio longitudinaliter oblique 
depresso, discrete punctulato subnitido. 
Long. 53 lin. An £. subopace 9? 
Hab. South Brazil. 
Ectenessa sexmaculata. 
Rufo-testacea, elytris utrinque maculis tribus magnis ovatis albo-testaceis, quarum 3* apicali nigro-marginata ; 
thorace elongato-ovato inermi, dorso grosse punctato opaco, basi et eallis obliquis duobus a basi usque ad 
medium haud punctatis ; elytris crebrius punctulatis, dorso antico lineis duabus elevatis, apice sinuato- 
truncatis utrinque bispinosis ; antennis tibiisque subtilissime vix perspicue carinatis; femoribus posticis. 
gradatim clavatis. 
Long. 54 lin. 3? 
Hab. Brazil. The elytra are marked similarly to many Ibidha. 
Ibidion anormale, Thomson, Physis, i. 3, p. 145, is probably a fourth species of Hetenessa, and is similarly 
marked to E. seamaculata. 
BIOL. CENTR.-AMER., Coleopt., Vol. V., January 1885. 21 
