MANUAL OF NATUEAL HISTORY 243 



5. FAMILY. Water -Measurers (Hydrometridse). 



Head generally as broad as thorax ; antennae 

 long, 4-jointed; rostrum of moderate length; 

 body long, narrow, clothed on ventral surface 

 with a fine down ; legs long. Found running 

 on the surface of water. 



6. FAMILY. Long-necked Bugs (Reduviidse). Head 



small, narrowed behind into a sort of neck ; 

 eyes prominent ; rostrum rather short, ro- 

 bust ; antennae long, terminal joints very 

 slender ; thorax frequently spined ; body va- 

 riable, long and narrow, short, or abdomen 

 much dilated and very thin at the edges ; legs 

 long. 



7. FAMILY. Bed-Bugs (Cimicidse). Body very flat ; 



wings rudimentary, in the form of small 

 scales ; antennae 4-jointed ; legs slender, of 

 moderate length. 



8. FAMILY. Bark-Bugs (Tingidae). Size small ; 



body very flat and broad ; antennae moderate, 

 of equal thickness throughout, sometimes 

 knobbed ; rostrum very short, 3-jointed ; fore- 

 legs occasionally fitted for seizing prey ; tho- 

 rax sometimes having a membranous dilata- 

 tion in place of a scutellum, which, with the 

 hemelytra, are reticulated. 



9. FAMILY. Soft -bodied Bugs (Capsidae). Size 



small ; body convex ; antennae elongated, 

 second joint thickened at the end, terminal 

 joints slender ; rostrum long, 4-jointed ; legs 

 long and slender, hind-legs sometimes very 



