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NEW GENERA AND SPECIES OF THYBIDIDAE AND 

 GEOMETRIDAE FROM AFRICA. 



BY W. WARREN, M.A., F.E.S. 



Family TllYRiniDAE. , 



1. Dysodia fenestratella sj). nov. 



Foit'winys : olive-drab; the murkings olive fuscous; the costa witli foar 

 (lark marks, oue near base, one before and beyond the middle, the fourth before 

 apox ; from the inner side of the last a thick olive fuscons band runs parallel 

 to the hiiidmargiu as far as vein 2, where it is joined by a shorter band from 

 the subcostal vein, the two forming a V-shaped mark : above and below the 

 median vein on the inner side of the V are two small round hyaline spots, the 

 upper one within the cell ; beyond the outer arm are three similar spots in 

 the spaces between veins - and o ; below vein L' the V-sbaped mark swells out 

 into an inverted funnel-shaped mark resting on the inner margin ; beyond the 

 three outer hyaline spots are several smaller pale spots mixed with dark scale 

 jiatches ending in a larger patch at anal angle ; from the outer arm of the V below 

 the costa a curved dark streak runs to middle of hiiidmargin : fringe olive fuscous ; 

 all the veins pale. 



Hindwiiign : with a large anvil-shaped hyaline blotch, round which are 

 collected an irregular lot of small rouml hyaline spots alternating with dark 

 olive patches ; marginal area paler, without spots. 



Underside mottled with greenish grey and olive fuscous ; the V-shaped mark 

 of forewings dark and very conspicuous. Head, thorax, and abdomen like ground 

 colour of wings. 



Expanse of wings : >'] mm. 



One S from the west side of the Luitpold ^Mountains, near Ikutha, British 

 East Africa. 



The costa of forewings is incurved in middle : hindmargin of both wings 

 bulged at vein '■), in the hindwings indented lieyond cell. 



Family GEO Ml-: TRIDAE. 



SuBKAJiiLV GEOMETllINAE. 



Lathochlora gen. nov. 



Fofewi>iyi<. : with costa curved throughout, more strongly arched at base ; 



apex prominent, blunt ; hindmargin somewhat irregularly concave from apex to 



vein 3, then sharply oblique. 



Hindwinyx: bluntly angled at vein 4, and elbowed at vein fj, concave between. 

 Palpi moderate, the terminal joint drooping : tongue present; frenulum absent; 

 antennae short and thick, subserrate, with close clavate teeth, rasped above. 



NeuratioH : forewings, cell broad, about one-third of wing ; discocellular shortly 

 concave above, then oblique and faint; first median nervnle at two-thirds, second 

 and third from lower angle of cell ; lower i-adial from the bend in the discocellnlar, 



