I"^] ORTHORRHAPHA NEMATOCERA 



Synopsis of the Families of Orthorrhapha Nematocera^. 



33 



jBody and wings thickly co^'ered with hairs; flies resembUng moths 



(-big. 20) =PsYCHODIDffi. 



-2. 



L Flies not resembling moths 



fWmgs with a network of fine vein-like creases besides the ordinary 

 i ^ veins (Fig. lo) =Blepharocevidce\ 



I Wings without any additional network of vein-like creases =3. 



r Scutum usually with a V-shaped transverse suture (Fig. 11); wings 

 i usually with a discal cell =, Tipulidcs. 



L Scutum without a transverse suture =4. 



/Wings with a discal ceil (Fig. 12) =RhyphidcB. 



L Wings without a discal cell =5. 



r Antenna abnormal, apparently consisting of two segments and a 

 terminal arista (Fig, 14) =OrphnephiUdm. 



Antennae normally nematocerous =6. 



r Posterior edge of wing fringed with scales (Fig 25) =CuLiciDyE. 

 \ Posterior edge of wing not fringed with scales = 7. 



(- Jlinute fragile midges ; wings commonly with only three longitudinal 

 j veins (Fig. 13) =CecidomyidcF. 



7 j Not abnormally dehcate and fragile ; wings usually with numerous 

 L veins. =8. 



„ rOcelli present (Fig. 16, oc) =9, 



\ Ocelli absent . =10. 



r Coxae elongate : antenna usually elongate ; all the tibiae end in spurs 

 9 <; (Fig. 15) =Mycetophilidce. 



L Coxse short ; antenna usually shorter than thorax =Bibinnidce. 



/The costal vein extends all round the wing =Dix-idcF. 



'° I The costal vein stops at or near the tip of the wing (Fig. 17) =ii. 



/-Gnat-like flies with long slender legs; antennae filiform, often with 

 I whorls of hairs =Cliironomidai^. 



[ I -J Thick-set flies with stout legs ; antennas stout and stiff, hardly longer 

 j than the head, and never having whorls of hairs ; wings remarkably 



L broad = Simidiidfn^ . 



1 From Alcock's Entomology for Medical Officers, p. 46. 



- Some of the females belonging to Cuvupira have been suspected of blood- 

 sucking habits. 



'■' Signifies that some of the members of these families are known to suck 

 blood. 



