Key to species of Paravibrissina

1. Three postsutural dorsocentral setae............................................................................................................2

- Four postsutural dorsocentral setae..............................................................................................................4

2. Eye bare; abdomen with grayish white or pale brownish pollinosity on anterior 2/3–3/4 of each tergum, without median discal setae on 3rd to 5th terga; 2 katepisternal setae ........................... P. adiscalis Shima

- Eye densely or rather sparsely long haired; abdomen with silvery white or golden yellow pollinosity, with strong median discal setae on 3rd to 5th terga; 2 or 3 katepisternal setae..................................................3

3. Body with dense yellowish pollinosity (Fig. 31); basicosta reddish yellow; 2 katepisternal setae .............. ....................................................................................................................................... P. aurigera sp. nov.

- Abdomen with dense pale yellowish or silvery white pollinosity contrasting with black thorax (Fig. 29); basicosta black; 3 katepisternal setae ........................................................................ P. argentifera sp. nov.

4. Two katepisternal setae; abdomen with grayish white pollinosity on anterior portion of 3rd to 5th terga; fore tibia with 2 posterior setae; mid tibia with a ventral seta in male........................................................5

- Three katepisternal setae; abdomen with dense silvery white pollinosity contrasting with black thorax (Fig. 30); fore tibia with 1 posterior seta in male, 2 in female; mid tibia without ventral seta in male ....... ................................................................................................................................... P. leucogaster sp. nov.

5. Abdomen with median discal setae on 3rd and 4th terga; abdominal syntergum 1+2 with strong median discal setae; wing evenly pale brownish hyaline ............................................................ P . pacifica sp. nov.

- Abdomen without median discal setae on 3rd and 4th terga; syntergum 1+2 without median marginal setae; wing distinctly tinged with brown basally and anteriorly ..................................... P . parvula sp. nov.