APHELOCIIIRINA. 577 



Div. 2.-CRYPT0CEIIATA.* 



Sub-Div. — Aquatilia. 



Section \.—AFHEL0CE1BINA.\ 



Family 1.— APHELOCHIRID^. 



Genm 1. — AphelocheiruS; Westio. 

 Oval, depressed. 



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

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

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

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

 together. Ei/es narrow, longish-oval. Mo strum ; 1st joint short; 

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

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



Tliorax. — 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. Scidellum 

 short, triangular, obtuse. Elytra generally undeveloped; when 

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

 veloped semioval) anterior margin suddenly abbreviated at about 

 ■i the length, prominent; EmloUum triangular; Ilemlrane nerve- 

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

 end nerves. Stermim ; Frostermim depressed, the middle angularly 

 raised ; Mesostermim short, with a middle keel ; scapulce narrow, 

 trapezoidal ; Iletastcrmim much depressed, hindwardly raised trian- 

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

 rangular. Leys; coxce long; tJtiyJis stout, compressed; 1st and 

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

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

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

 about -jrd the length of the tibiis ; joints in length subequal ; 3rd 

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

 claivs long, slender. 



* Page 11. t Page 43. 



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