94 ANALES DE HISTORIA NATURAL. (20) 



5.5. Alse normales Bennia Burr. 



1.1. Costa frontalis ang-usta, profunde sulcata. (Pronotum 



nunquam foliaceum.) 



2. Antennse long-iíudinem femorum anticorum dimidiam at- 



ting-entes val superantes, multiarticulatse, ápice plus 



minus clavatfe Goniphomastaces. 



Gomphomastax Br. 



2.2. Antennae femoris anticis breviores ápice haud clavat*. 



3. Metatarsus posticus supra in utroque marg-ine spinulosus 



vel serrulatus. 



4. Elytra et alse perfecte explicata. Species asiaticae. Erucii. 



5. Fastig-ium capitis obtusum. Elytra et alie apicem abdomi- 



nis superantia Erucius StliL 



5.5. Fastig'ium verticis prorectum. Elytra et alse dimidiam 

 partem abdominis haud superantia.. . Mnesicles Stal. 



4.4. Elytra et alse nulla. 



5. Vértex rotundatus. Species indicse Mastacides Bol. 



5.5. Vértex plus minus acuminatus. Species americana^ 



Episacti. 



6. Lamina subg-enitalis (/ elong-ata, lanceolata, ápice minute 



serrulata. Pronotum carinis lateralibus nullis 



Episactus Br. 



6.6. Lamina subg-enitalis ^f brevis, subg'lobosa, ápice iner- 



mis. Pronotum carinis lateralibus instructum 



Parepisactus G. T. 



3.3. Metatarsus posticus supra muticus, interdum hirsutus. 



4. Pedes g-raciles, long-i. Tibise anticse subtus in parte apicale 



utroque marg-ine spinulosse. 



5. Tibise posticse spinis long-itudine sequantibus. Species asiá- 



tica Chinse. 



China Burr. 



5.5. Tibise posticse spinis long"itudine alternantibus. (Excepto 



g-enere Morsea.) Species americanse Eumastaces. 



6. Fastig-ium verticis inter oculos angustissimum , haud pro- 



ductum. 



7. Elytra hyalina, reg-ulariter reticulata; alse hyalina^, haud 



coloratse Eumastax Burr. 



7.7. Elytra opaca, colorata, conferte vel irreg-ulariter reticu- 



lata. AhiR coloratse Paramastax Burr. 



6.6. Fastig-ium verticis plus minus productum. 



