344 INSECTA. 



Cerophytum, Lat., 



Is removed from the others by the tarsi, of which the four first 

 joints are short and triangular, and the penultimate is bifid. 



The antennae of the males are ramous on the inner side, the base 

 of the third joint and of the following ones being extended into a 

 widened branch rounded at the extremity; those of the females are 

 serrated(l). 



In all the other subgenera the joints of the tarsi are almost cylin- 

 drical and entire. 



Sometimes the head is plunged into the thorax up to the eyes; 

 the anterior extremity of the presternum projects under the head, 

 and its margin is arcuated. 



In some, the labrum and mandibles are concealed by the anterior 

 extremity of the presternum, the clypeus or epistoma being widened 

 and laid over it. Such is the 



Cryptostoma, Dej. Elater, Fab. 



In which the internal angle of the summit of the third joint of the 

 antennae and of the seven following ones is prolonged into a tooth; 

 the second and fourth joints are shorter, the last is long and narrow, 

 and there is a straight linear branch on the inner side of the third, 

 near its origin. 



The mandibles are unidentated under the point. The maxillae 

 present but a single lobe, and are small and membranous, as is also 

 the ligula. The palpi are very short. The tarsi are small, thin, 

 and almost setaceous. 



The only species known, the Elater dentlcomis, Fab., is found 

 in Cayenne, whence it was sent to the Mus. d'Hist. Nat. of 

 Paris by M. Banon. 



Nematodes, Lat. 



First joint of the antennae elongated, and the five following ones 

 forming reversed cones, equal, the first or second of this number 

 excepted, which is somewhat shorter, and the five last thicker and 

 almost perfoliate; terminal joint ovoid. 



The body is almost linear(2). 



(1) Lat., Gener. Crust, et Insect., IV, 375. The Malasis sphondyloides, Germ., 

 Faun. Insect. Eur., XI, 5, is closely allied to the female of the species which is 

 the type of the subgenus. The Melasis picea, Palisot de Beauvois, Insect. d'Afr., 

 et d'Amer., VII, 1, has also some analogy to the Cerophyta. 



(2) Eunemis filum, Manner. 



