COLEOPTERA. 475 



antennae are always short and almost cylindrical, the maxillary palpi 

 merely somewhat larger at the extremity, but not terminated by a 

 securiform joint, and all those of the tarsi entire. 



Eustrophus, Illig. Mycetophagus, Fab. 



The body is ovoid and the thorax broad, emarginated before, and 

 with prolonged posterior angles; the antennae are shorter than the 

 thorax, and the four posterior tibiae elongated and terminated by two 

 long spurs(l). 



Hallomenus, Payk.- Dircsea, Fab. 



The body more elongated, oval; antennae longer than the thorax, 

 and the posterior tibiae long and slender, with two very short ter- 

 minal spurs(2). 



There the body is usually narrow and elongated, the maxillary 

 palpi are terminated by a securiform joint, and the penultimate joint 

 of the tarsi, or at least of the four anterior ones, is bilobate. 



Sometimes the antennae are thick and composed of short obconi- 

 cal or turbiniform joints. 



In some, as in the two following subgenera, the body is oval, and 

 the thorax transversal or almost isometrical, and becomes widened 

 from before posteriorly. 



Dircjea, Fab. Xylita, Payk. 



Or Dircaea properly so called, where the maxillary palpi are not 

 serrated, and their last joint projects more on the inner side than the 

 preceding ones. The thorax is insensibly lowered on the side. The 

 scutellum is very small(3). 



* Melandrya, Fab. 



Where the maxillary palpi are evidently serrated, the extremity of 

 the second and third joint being prolonged into a point, and on a 

 level with the fourth or the last. The thorax is abruptly depressed 

 laterally, near its posterior angles, and the posterior margin is 

 sinuous. The scutellum is of an ordinary size(4). 



(1) Mycetophagus dermestoides, Fab. Another species has been brought from 

 Brazil by M. de la Cordaire. 



(2) See Gyllenh., Insect. Suec, I, ii, p. 526. 



(3) Gyll., Insect. Suec, I, p. 516, minus the species which he calls the bifas- 

 ciata, quercinasee Hyfulus, and fuscula see Schaptia. 



(4) Gyll., Insect. Suec, I, ii, p. 533, with the exception of the M. ruficollis 

 Dircsea ruficollis, Fab. which it appears to me should be referred to the subgenus 

 Conopalpus. 



