APHELOCHIRINA. 577 



Div. 2,-CRYPTOCEBATA.* 



Sub-Div. AQUATILIA. 



SECTION 1 .APHEL CH1EINA. f 



FAMILY 1. APHELOCHIRID^E. 



Genus 1. APHELOCHEIRUS, Westw. 

 Oval, depressed. 



Head deflected, seen from above (including the ejes) obtuse- 

 triangular ; from the side pyriform, tumid at the base. Antenna 

 laid under the margins of the pronotum, the 4 joints progressively 

 longer; 1st annular; 4th fusiform, as long as the 2nd and 3rd 

 together. Eyes narrow, longish-oval. Rostrum ; 1st joint short ; 

 2nd very long, stout at the base, and gradually less ; 3rd ird the 

 length of the 2nd ; labrum covering the 1st joint of the labium. 



Thorax. Pronotum subtrapezoidal, hindwardly very wide ; an- 

 terior margin very deeply concave, the anterior angles produced 

 exterior to the eyes ; sides slightly rounded ; posterior margin 

 slightly sinuate, the hinder angles oblique, projecting. Scutellum 

 short, triangular, obtuse. Elytra generally undeveloped; when 

 present, of the same coriaceous texture throughout ; Coriwi (unde- 

 veloped semioval) anterior margin suddenly abbreviated at about 

 \ the length, prominent; 'Embolium triangular; Membrane nerve- 

 less. Wings; one lanceolate cell near the anterior margin, with 2 

 end nerves. Sternum ; Prosternum depressed, the middle angularly 

 raised ; Mesosternum short, with a middle keel ; scapulae narrow, 

 trapezoidal ; Metasternum much depressed, hindwardly raised trian- 

 gular, sides prominent, sinuate ; pleura large, oblique, almost quad- 

 rangular. Legs ; coxa long ; thighs stout, compressed ; 1st and 

 2nd pairs dilated at the base ; 3rd pair simple, rather longer ; tibia ; 

 1st and 2nd pairs nearly cylindrical, thickened to the apex ; 3rd pair 

 compressed, sub trigonate, finely ciliated; tarsi; 1st and 2nd pairs 

 about rd the length of the tibiae ; joints in length subequal ; 3rd 

 pair more slender, rather shorter than the tibia? ; 1st joint longest ; 

 claws long, slender. 



* Page 11. f Page 43. 



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