542 HEMIPTERA. 



dust (DeGeer) and so completely do they exercise this habit 

 that a specimen shut up by M. Brulle, and which had under- 

 gone one of its moultiugs during its imprisonment, divested 

 its old skin of its coat of dust, in order to recover itself there- 

 with." (Westwood.) The Evagoras viridis Uhler MS. is said, 

 by the Editors of the "American Entomologist," to devour the 

 plum curculio. 



In Harpactor the head is convex behind the eyes ; the ocelli 

 are distant, knobbed, and the first antennal joint is as long 

 as, and stouter than, the two succeeding ones together. Har- 

 pactor cinctus Fabr. (Fig. 546 ; 6, beak) attacks the larva of 

 the Colorado Potato-beetle. Another member of this family, 

 the ConorMnus sanguisuga of Leconte, is said to occur in 

 beds, its bite being very painful. (American Entomologist, 

 p. 87.) 



CORISI^E Latreille. In this very extensive family, which is 

 especially rich in species in the tropics, where they are gaily 

 colored, the head is flat, extended horizontally, and sunken up 

 to the eyes within the prothorax. The antennae are long, fili- 

 form, often clavate at the tip, and from three to five-jointed. 

 The two ocelli are almost always present, while the beak-sheath 

 (labium) is four-jointed. The tarsi are generally three-jointed, 

 and the claws are provided with two suctorial pads. The 

 membranous wing-covers have distinct, often forked, longitu- 

 dinal veins. 



We follow Gerstaecker in retaining Latreille's family Cor- 

 isiae, which includes the "Lygaeidae," "Coreidae" and "Penta- 

 tomidae" of recent authors, as they all agree in the general 

 form of the body, and, as stated by Gerstaeeker, in the struc- 

 ture of the antennae, the uniform presence of two ocelli, the 

 longitudinal veins of the fore wings, and the hardness of 

 the crust of the body; these characters separate them from 

 the preceding groups. 



In Lygaeus and allies (Ly^a-ida 1 ) the scutellum is of the 

 normal si/e ; the antenna' are four-jointed, and are attached to 

 the under side of the head, and the beak is tolerably long. In 

 Lygceus the head is elongated acutely, the eyes globular, the 

 ocelli distinct, and the antenna' are slender, seaivelv half as 



