X( 



NOTES ON THE LONCHAEIDAE (DIPT.). 203 



Type 9, a single specimen (British Museum) from Gold Coast, Accra, iv. 1916, 

 in laboratory " (Br, J. W. S. Macfie). 



5. Lonchaea (Carpolonchaea) laevis, sp. nov. 



A shining, bluish-black species with quite hyaline wings, distinct in the male sex 

 owing to the not prominent genitalia and the simple last abdominal segment ; from 

 plumosissima it is distinguished by its smaller size and the shorter plumosity of the 

 arista. 



cJ $. Length of the body, 3 '5-3 '8 mm. ; of the wing, 3 '8-4 mm. 



Frons black, opaque or with faint sericeous reflexions, the vertical and ocellar plates 

 bluish and shining ; in the female it is only IJ times as broad as that of the male. 

 Antennae entirely black, with the third joint extended to the epistome, three times 

 as long as the basal joints together ; arista yellowish at base, its plumosity broader 

 than the breadth of the third antennal joint, the plumules close together and straight. 

 Lunula black, but the prominence between the base of the antennae is white-dusted ; 

 face greyish-dusted ; palpi and proboscis black ; jowls linear, vibrissae not specially 

 developed. Thorax very glistening on the back and there with bluish reflexions, 

 black on the pleurae ; mesopleurae on anterior border with 3, and on posterior border 

 with 3 bristles, in the middle with a tuft of bristly hairs ; sternopleurae with 2 strong 

 bristles, which are curved upwards. Scutellum more aeneous, faintly dusted, with 

 short bristly hairs at border. Halteres black ; squamulae white and with white 

 cilia. Abdomen coloured and shining like the back of mesonotum but without 

 bluish reflexions ; last segment of male not elongated or ciliate ; genitalia not visible ; 

 ovipositor as long as the last two segments together. Legs entirely black ; middle 

 femora with complete and long ciliation on hind side. Wings quite hyaline and with 

 pale yellowish veins ; second costal cell very much dilated outwardly ; last portions 

 of 3rd and 4th veins parallel ; small cross- vein before the middle of the discoidal cell 

 and before the end of the first longitudinal vein ; chitinised part of the sixth vein 

 short, but the spurious continuation extended to the hind border ; hind cross-vein 

 quite straight, and longer than its distance from the end of the fifth vein. 



Type cJ, tjrpe $ and an additional specimen (British Museum) from Zanzibar (Dr. 

 W. M. Aders) ; some other specimens of both sexes in the writer's collection from 

 Erythraea, Ghinda, August-December 1916 (Dr. A. Mochi). 



6. Lonchaea (Carpolonchaea) ophyroides, sp. nov. 



Also closely allied to plumosissima, but easily distinguishable on account of its 

 greater size and the much shorter plumosity of the arista. 



cJ $. Lengths of the body, 4*2 — 4*5 mm. ; of the wing, 4 5 — 4 8 mm. 



Head as described for plumosissima, but the antennae with the third joint not 

 extending below the oral margin, and with the arista much more shortly plumose, 

 the breadth of the plumosity being not broader than the breadth of the third antennal 

 j oint and the plumules being thin, dense, and quite straight. All the rest of the body, 

 legs and wings as in plumosissima ; but the abdomen is aeneous, without bluish 

 reflexions ; the ciliation at hind side of middle femora is more developed ; the wings 

 are distinctly yellowish-fuscous on the fore half. 



