RHYPHOLOPHUS. 141 



so as to embrace all the Eriopterse the wings of which are 

 pubescent on the whole surface. 



Table for determining the species. 

 f Discal cell closed, or, if open, it coalesces with, the second posterior 



cell. 2 



I Discal cell open ; it coalesces with the third posterior cell (Tab. I, 



I %. 15). 5 



2 f Wings variegated with gray or brown. 3 



I Wings uniformly colored. 4 



o ( Wings clouded with gray. 1 nubilus 0. S. 



X Wings spotted with brown in all the cells. 2 innocens, n. sp. 



. ( Four basal joints of the antennae pale. 3 nigripilus, n. sp. 



I Antennae altogether blackish. 4 holotrichus, 0. S. 



/ Thorax reddish, with a distinct black line in the middle. 

 5 < 5 rubellus, n. sp. 



(. Thorax gray, without any distinct stripe. 6 



fKnob of the halteres yellow ; wings with a conspicuous stigmatical 

 spot. 6 meigenii 0. S. 



i Knob of the halteres infuscated ; stigmatical spot not conspicuous. 

 ^ 7 monticola, n. sp. 



Description of the species. 



1. R. nuMlllS Q. S. % and 9 .— Cinereus, vitt& thoracis distincta, 

 fusca ; alis griseo nebulosis, cellula discoidali clausa ; venis longitudi- 

 nalibus sixta et septima versus apicem subparallelis. 



Gray, thorax with a distinct brown stripe ; wing clouded with grayish ; 



discal cell closed ; sixth and seventh longitudinal veins subparallel 



towards the tip. Long. corp. 0.23 — 0.27. 

 Syn. Erioptera nubila 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 227. 



Brownish-gray ; a distinct, narrow brown stripe over the tho- 

 rax ; thorax sparsely, abdomen densely clothed with rather long, 

 soft, pale yellowish hairs ; antennas brownish-black, paler at the 

 basis of the flagellum, with short verticils ; palpi black ; halteres 

 pale, slightly infuscated at the base of the knob, the tip of which 

 is clothed with a short golden-yellow pubescence ; feet brownish, 

 coxae and basis of the femora paler ; knees pale ; femora with an 

 indistinct brownish band before the tip ; wings (Tab. I, fig. 14) 

 grayish-white, with gray nebulosities ; they form two more or less 

 marked bands across the apical portion of the wings ; a third 

 band passes over the cross-veins ; a cloud in the first basal cell ; 

 another in the axillary, and some nebulosities in the spurious 



