PLATE 19. 



HYDRODROMICA. 



SECTION 1. HJDEOMETRINA. 



FAMILY 1. HYDROMETRID^E. 



Genus 1. HYDROMETRA (p. 557). Fig. 1, H. gibUfera (p. 564) ; 

 10, head in profile and antenna ; 1Z>, fore leg ; le, labrum ; 

 Id*, underside, $ ; ld*cf, genital segments, < un- 

 derside; 10* c, idem <$, side view; Id, idem $, side 

 view. 



FAMILY 2. VELIID^E. 



Genus 1. VELIA (p. 569). Pig. 2, F. currens (p. 571) ; 20, head in 

 profile and antenna ; 2t>, fore leg ; 2c, rostrum. 



Genus 2. MICEOVELIA (p. 573). Fig. 3 , M. pygmcea; 3 $ , apterous 

 form ; 30, head in profile and antenna ; 3b, rostrum ; 3c, 

 hind leg ; 3d, fore tarsus. 



SECTION 1.LIMNOBATINA. 

 FAMILY 1. LIMNOBATID^E. 



Genus 1. LTMNOBATES (p. 575). Fig. 7, L. stagnorwm (p. 576) ; 

 7, head in profile and antenna; 7J, head seen from 

 above. 



GEODROMICA. 

 SECTION l.HEBRINA. 

 FAMILY 1. HEBRIDES. 



Genus 1. HEBRUS (p. 265). Fig. 4, H.pusillus (p. 266); 4, antenna; 

 4&, elytron. 



AQUATILIA. 

 SECTION l.APHELOCHIRINA. 



FAMILY 1 . APHELOCHIRID^E. 



Genus 1. APHELOCHEIRFS (p. 577). Fig. 5, ^4. cestivalis (p. 578) ; 

 50, antenna; 5&, fore leg. 



SECTION 2.NAUCORINA. 

 FAMILY L NAUCORILm 



Genus 1. NAUCORIS (p. 579). Fig. 6, JV. Cimicoides (p. 580); 6a, 

 antenna; 6&, head in profile; 60, labrum and ros- 

 trum; 6<J, genital segments ?; 6? genital seg- 

 ments . 



