164 



MvoDOCHA, Lat. * 



We have now arrived at Longilabra, in which the antennae, com- 

 posed cf four joints, become gradually thinner towards the extremity, 

 and frequently even abruptly so, or are setaceous. 



In our Fam. Nat. du Reg. Anim., we have formed the subgenus 



AsTEMMA, 



With certain species in which the antennre are gradually setaceous 

 and where the second joint is of equal thickness arid almost glabrous. 

 The thorax is hardly narrower before than behind, and forms a trans- 

 versal square, or is cylindrical; the head is as if incised perpendicu- 

 larly or rounded at its origin f. 



MiRis, Fab. 



Similar to Astemma in the antennae, but removed from it by the 

 thorax, which is much -wider posteriorly than before, and trape- 

 zoidal I. 



Capsus, Fab. 



A similar and trapezoidal thorax, but the second joint of the an- 

 tennae is attenuated at base, and densely pilose, particularly towards 

 the extremity, otherwise almost cylindrical and slender like the 

 first §. 



Heterotoma, Lat. 



The Heterotomse are very distinct from the preceding Insects, by 

 the size and width of the two first joints of the antennae, and of the 

 second particularly, which forms an elongated palette ; the two last 

 are very short ||. 



In the remaining Hemiptera of this family there are but two or 

 three ajiparent joints ^ in the sheath of the sucker ; the labrum is 

 short and without striae. The first joint of the tarsi, and frequently 

 even the second, is very short in the greater number. 



Sometimes the legs are inserted in the middle of the pectus; they 

 terminate by two distinct hooks which originate from the middle of 

 the extremity of the tarsus ; they can neither be used as oars, nor for 

 running on the water. 



We then separate those species in which the rostrum is always 

 straight, sheathed at base or throughout its length; where the eyes 

 are of an ordinary size, and where the head at its junction with the 

 thorax exhibits no appearance of an abrupt neck or strangulation. 



* See Lat., Gener., &c., and Encyc. M^thodique. 



•f- The Saldee pallicornis, flavipes, Fab., and some other species, but in which the 

 body is much narrower and longer, and somewhat more analogous in the head to the 

 Myodochae. 



+ Fab., Syst. Ryng. ; Lat. lb. p. 124. 



§ Fab., Syst. Ryng. ; Lat. Gener., Crust, et Insect., Ill, p. 123. 



II Capsus spissicornis. Fab. 



^ Four in the Reduvii, but the first is very short, nlmost null. 



