66 R. W. CROSSKEY 



- Abdomen without discal setae on T5. Arista pubescent. Second costal sector 

 haired ventrally. Scutellum with only one pair of marginal setae (the subapicals), 

 basal and apical setae absent. Bend of vein M forming an evenly rounded curve 

 without trace of appendix. Pre-alar seta almost always present, though small. 

 [Indonesia & New Guinea] .... MEGISTOGASTROPSIS Townsend 



Tribe NEMORAEINI 



This small tribe is confined to the Old World and contains only the genera 

 Nemoraea Robineau-Desvoidy (of which Protonemoraea Baranov and Dexiomima 

 Brauer & Bergenstamm are now treated as synonyms) and Chaetolydella Villeneuve. 

 The latter genus is African and is not really distinguishable from Nemoraea, as 

 van Emden (i960) states, but this is not the place in which to establish synonymy. 

 Nemoraea is widely distributed throughout the Palaearctic Region (including 

 Japan), Africa, and the Oriental Region, but until now has not been reported from 

 Australia. One undescribed species is now known from New South Wales and 

 Queensland; this species has a mainly orange-red abdomen and a black-and-yellow 

 striped scutum and closely resembles N. ornata (Bigot) from the Oriental Region 

 (it also has a superficial appearance very reminiscent of the New Zealand genus 

 Protohystricia Malloch, which belongs in the local New Zealand tribe Occisorini). 

 In New Guinea the Nemoraea fauna contains at least four undescribed species, and 

 there are some large and spectacular species still undescribed in the Oriental fauna. 



The numerous species of Nemoraea tend to fall into two moderately distinct 

 categories, one containing species in which the whole surface of the lower calypter 

 is haired and the second costal sector bare ventrally and the other containing 

 species in which hairing of the upper surface of the lower calypter is confined to the 

 outer edge and the second costal sector is haired below (the Australian species falls 

 into the latter category). The name Nemoraea strictly applies to the first group, 

 and the names Dexiomima and Protonemoraea to the latter group. Many 

 intermediates exist, however, and the current treatment of all the forms as comprising 

 the single genus Nemoraea is appropriate; examples of intermediate species, falling 

 between the two main categories, are N. echinata Mesnil from Burma in which the 

 outer half of the lower calypter is haired, and N. dotata (Walker) from Celebes in 

 which the lower calypter has hair only on the outer margin but in which the second 

 costal sector is bare on its ventral surface. 



The chief characters of the Nemoraeini are as follows. Eyes haired; parafacials bare; 

 arista micropubescent ; face usually with a distinctly raised central ridge which is rounded 

 on its anterior surface (not forming a sharp carina) ; genal dilation bearing unusually strong 

 setulae or even setae as strong as the peristomal setae (Text-fig. 38) ; epistome flat, invisible 

 in profile ; vibrissae level with or only very little above the level of the epistome ; inner vertical 

 setae crossed (sometimes subparallel in <§) ; outer vertical setae unusually weak in 9. often 

 not differentiated from postocular row; palpi unusually dorsoventrally flattened, band-like; 

 prosternum, prosternal membrane and propleuron bare ; three post ia setae ; 3 + 3 or 3 + 4 d c 

 setae; two or three sternopleural setae; infrasquamal hairs present or absent; pteropleural 

 seta present; fore coxa completely haired, or almost so, on its inner anterior surface; mid 

 tibia with a v seta; hind coxa bare posterodorsally; hind tibia with a small (rather 



