420 ME. F. W. EDWARDS ON DIPTEEA 



!it the base and apex; first segment rather more than twice as long as the second; 

 second, third, fourth, and sixth about equal in length ; fifth barely half as long as the 

 fourth ; ovipositor short, pointed, corneous. 



Legs moderately stout, front-femora somewhat thickened, without any ventral 

 bristles ; middle tibiae with a small but distinct preapical spine. 



Wings strongly pictured, in a manner somewhat recalling Cleitamia. Costal spine 

 absent, all the veins bare. Auxiliary vein (Sc) distinct except at its extreme tip ; first 

 vein (Ri) reaching costa about the middle of the wing, very slightly beyond tlie small 

 cross-vein ; second vein (E.2+3) wavy ; third vein (R4+.5) somewhat arched, almosi 

 jmrallel with the fourth ; fourth vein (M) slightly curved beyond the hind cross- 

 vein ; sixth vein reaching the hind-margin; small cross-vein far before the middle 

 of the discal cell ; hind-cross-vein slightly outwardly oblique and curved ; basal 

 cross-vein inwardly oblique ; anal cross-vein slightly concave ; anal cell considerably 

 drawn out below. 



The specimen on which this genus is founded is very difhcult to place. The general 

 shape is very suggestive of Dacus, but the venation and the presence of a sternopleural 

 bristle exclude it from the Dacus group ; the wing-pattern and venation are, on the 

 other hand, strongly reminiscent of the Ortalinse, but the presence of lower fronto- 

 orbital bristles prevent its location in that subfamily ; the presence of a preapical 

 bristle on the middle tibiae might perhaps be taken to indicate a connection with the 

 Sciomyzinse, but this is not supported by other characters, and as the preapical tibial 

 bristle is also present in Bioxa for7nosipcnnis there is no need on its account to 

 exclude Ortaloftera from the Trypetinse. 



74. Ortalopteka cleitaatina, sp. n. (PI. XXXVIII. figs. 9, 9 a.) 



1 ? . Mimika River, Aug. 1910. {Type of the species.) 



Head dull light ochreous-brown, with some darker mottling on the vertex ; antenna; 

 ochreous, the apex of the third joint darker ; palpi ochreous. Thorax and abdomen 

 uniformly dull black. Legs blackish-brown, the front-femora, the base and apex of 

 the middle and hind-femora, the apex of the middle tibise, and the greater part of the 

 middle and hind-tarsi more reddish-brown. Bristles and pubescence of the whole insect 

 black, except on the undersides of the tarsi, where the pubescence is reddish. Wings 

 with dark brown markings as shown in the figure ; these markings are reminiscent of 

 the Ortalid genus Cleitamia and also of the newly described Trypetid Callistomyia Bezzi. 

 Halter es yellow. 



Length of body 10 mm., of wing 8 mm. 



