150 HEMIPTERA. 



Phlcea paradoxa, Am. $ Serv. Hem. 118. 2. pi. 5. fig. 8 (1843), 

 (nee Hahn). 



a. . From Mr. Birch's Collection. 



b. (Larva) Brazil. From M. Mornay's Collection. 



Fam. 11. HALYDID^E. 



Antennae of from three to five joints. Rostrum long, generally 

 reaching the abdomen, slender ; basal joint enclosed in a canal 

 of the under surface of the head. Eyes very prominent. Body 

 not dilated all round into foliaceous lobes. Abdomen furnished 

 beneath with a more or less distinct longitudinal furrow*. Tibiae 

 unarmed ; tarsi of three joints. 



Halys, Fab. Syst. Rh. 180 (1803). 

 Halydes, Am. fy Serv. Hem. 103 (1843). 



TABLE OF GENERA. 



I. Basal joint of the antennae reaching or 

 passing the apex of the head. 



A. Head narrowed and pointed in front, 

 with the eyes very large and prominent ; 

 the portion in front of the line of the 

 anterior margin of the eyes not longer 

 than that behind that line. 



a. Antennae filiform, with the two api- 

 cal joints as thick as the preceding. . 3. OCHLERUS. 



b. Antennas wdth the two apical joints 

 thinner than the preceding. 



a. Antennae five-jointed ; second joint 



not much longer than the first. ... 4. MACROPYGIUM. 

 )3. Antennae four-jointed; second joint 



about three times as long as the 



first 7- ALATHETUS. 



B. Head with the anterior portion longer 

 than the posterior ; eyes moderate. 



a. Lateral lobes of the head passing the 

 central lobe. 



* This furrow is spraetimes scarcely perceptible in some insect! 

 which in their other characters very closely approach the insects 

 this family, and must therefore be placed in it. They may generally 

 be recognized by the prominence of their eyes. Two genera belonging 

 to the second division of the following family (Bathyccelia and Cataulax] 

 possess the ventral furrow, but in other respects agree in character 

 with the group to which I have referred them, although the basal spine 

 is but slightly developed. 



