PLATE I. 



Diagram uf Syrphus: .l.=Antenna, .^r. =Arista, t). = Ocelli, £". =Eye 

 (compound), /■^ = Frons, F. =Vertex, Of.= Occiput, //. = Hcad, rA. = Thorax, 

 .Vc. = Scutellum, .-le. = Abdomen, /ï.=Haltere, 6'. = Squamula, i — vn.-^\ix 

 to 7th abdominal segments, I, II, ///=Fore, Middle and Hind Leg.>, Fc.=^ 

 Fémur, r; = Tibia, 7"<7 = Tarsi (five), C/.=Cla\v, /'<;.="Pad" or Pulvillus, 

 //«. =Humerus. .Vi/= Suture, /'.C =Post Alar Callus. 

 1 = Costa, 



2 = Subcosta (Mediastinal oi; axiliary), 



3 = Radius i (ist longitudinal or Subco^tal), 

 3 = Radius i+i (ind longitudinal or Radial), 

 5 = Radius 4 + 5 (3rd longitudinal or Cubital), 

 6=Media 1+2 Uth longitudinal or Discal), 



7= Media 3 + Cubitus 1 (5th longitudinal (jr Postiial), 



8 = Cubitus 2 (5th longitudinal or Anal 1 1 ii^>-VL-in 1, 



9 = Annal 2 (Otli longitudinal or .\iial), 

 io=.^nal 3 (.'\xiliary), 



ii=Vcna .Spuria or falsc vcin. 



.St. = Stigma, 



i-2.= Hunieral (lia.al (;.,lai) ( ros.-v.-in, 



i3.= Radio-mcdian (di-.<al or niiddlc) tn.-s vein, 



i4 = .Mcdia3 (I.ower 1 r -niail) < ro-s-\ ciii, 



)5 = Cubilus I cross-vcin, 



16= Médian (Louer marginal or postical) (ro>^ \.in, 



ist C. = First Costal (basai costal or Media^inal (cll), 



2nd C.= Second Costal (Mediastinal cell). 



Sec. = Subcostal (tliird costal cclI), 



Ri=Radius i (Marginal cell), 



R3=i. Radius 3 (Submarginal or Ciiliital m-II), 



R5 = Radius 5 (Subapical or ist poslerior cell). 



M2 = Media 2 (Discal or 2nd poslerior cell), 



Cui=Cubitus 1 (3rd poslerior cell), 



R = Radius (Uppcr, ist basai or radical cell). 



M = Media (Middle, and basai or radical cell). 



.'\i=Anal I (Lower 3rd basai, radical or .\nal cell). 



A2=Anal 2 (Axiliary cell), 



Alu = Alu!a (Axiliary lobe). 



Sicîc vicw of X. :i-j^yhtiuiii : l'r. Vni\\<, /•". — Face, (7. = C.rna or < hcck, 



.1/. :^Mouth, Tw. r^ilpper Mnuth-rdge, 77/. = Thorax, .S". =: Suture, W.^-. 



Wing, .SV. —. Sculellum, />',!. =basal segment of abdomen, .I.A'.C'. = Fronl, 



Middle and Hind Legs, i = Prothorax, 2 = Mesopleura, 3 = Pternplcura, 



4=-: Sternoploura, 3 .— Mctapleura, 6 = Hypopleura, 7— Plumula? 



llypothctical jiriniitive type of wing venation willi tlie named cross-veins 



added (after Coinstock & Xcedham). 



Wing of Tipida (after Comstock & Needhaiu). 



l'iiragiis icgyptiiis, licad front view. 



Paragiis tUnalis , hcad front view. 



Paragiis xgyplius, head in profile. 



Sphwroflioria flavicauda, head in iirofile. 



Syrphus cnrollœ, head in profile. 



Erisialis tœtiiops, hcad in profile. 



Lasiophthicus alhomaciilattis , head in profile. 



Mesemhrlus capensh, head in profile. 



Erisialis tenax, head in profile. 



Eumerits amœntis, head in profile- 



