48o 



THE INSECT WORLD. 



greenish brown, yellowish on the sides. The elytra of the male are 

 smooth ; those of the female are fluted. The front leg of the male 

 is provided with suckers. The larva is brown ; the pupa of a dirty 

 white. 



The Dytiscus marginalis sometimes attacks Hydrophilus piceus. 

 It pierces it between the head and the thorax, that is, in the weak 

 point of the cuirass, and devours it, in spite of its being the stronger. 

 The largest of the Dytisci, the Dytiscus latissiinus (Fig. 476), is 

 almost confined to the north of Europe. The Cybisters abound 

 especially in warm countries. The Cy bister Roeselii (Fig. 477), a 

 European species, has the reputation of having been taken in 

 England. This group contains also a great number of insects 

 more or less resembling the preceding in their conformation and 

 habits. We will confine ourselves to representing a few by figures. 



Fig. 478. — Acilius sulcatus (male). Fig. 479. — Acilius sulcatus (female). 



Fig. 480. Fig. 481. 



Acilius fasciatus (male). Acilius fasciatus (female). 



Fig. 482. 

 Noterus crassicornis. 



