igoy.] Records of flic I iiduDi M Hscu III. 95 



2. I^egs mainly whitish. Thorax with 4 gilded tomentum^ 



stripes . . . . lyong. 9 mm. diphysoides Wlk. 



3. Legs all black, except white base of tarsi. Thorax with a 



cinereous stripe each side . . lyong. 7 mm. lugubris Wlk. 

 BB Scutellum with 4 minute teeth. Antennae placed on a protu- 

 berance. Thorax (presumably) all black. Abdomen fusi- 

 form . . . . Long. 6 mm. scapularis Wlk. 

 A A Small species 3 to 4 mm. 



3rd antennal joint elliptical, anterior femora with black traces. 



Long. 3|- mm. signatipcnnis V. Wulp. 

 3rd antennal joint round, legs all pale yellow. 

 Long. 3 mm. exigua V. Wulp. 



This genus was placed by Walker in the subfamily Sargince 

 and puzzled me for a long time, the nearly uniform black colour 

 of all the species being such a contrast to the usual brilliant metallic 

 colours in this group. Not being able to obtain a specimen, I 

 was about to leave it where it was, when I obtained Van der 

 Wulp's paper on New Guinea Diptera, in which he not only des- 

 cribes two new species (which may both be removed later owing 

 to formation of the antennae) but gives a diagram of the wing of 

 Salduha shewing only three veins issuing from the discal and 

 basal cells combined, thus placing it at once in the PachygastrincB.^ 

 Walker made no mention of this venation, nor had I any informa- 

 tion on the point. The species 5. melanaria Wlk., formed by Van 

 der Wulp into a new genus Ccenocephalus, has 4 veins instead of 3 

 and therefore cannot be placed in PachygastrincB. This new genus 

 seems by its linear abdomen and form of antennae to approach 

 nearest to the HermetiincB, where I bring it for the present. 



Three other species of the restricted Salduha shew aberrant 

 forms of abdomen — scapularis with fusiform abdomen and 4 minute 

 teeth on the scutellum ; while singularis with incrassated posterior 

 femora minutely spined below, and the abdomen double the usual 

 length may easily form the type of a new genus. 5. areolaris, with 

 its clavate abdomen, may also be regarded later as generically 

 distinct. 



S. singularis Wlk., 1861, 



Pr. Linn. So., v, 271. 



'b 'b Batjan. A 'b is recorded from Ramoi (Papua). Osten 

 Sacken thinks it differs from gradicns Wlk. only by less white at the 

 base of the posterior tarsi and much more distinct spines on the 

 hind femora. The incrassated posterior femora and abdomen of 

 nearly double the usual length might entitle this species to generic 

 separation. 



1 Van der Wulp also expressed his opinion of its affinity with Tinda. 



