Laphystia Loew, 1847

Lavigne, Robert J. & Dennis, Steve, 2019, Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species, Zootaxa 4662 (1), pp. 1-126 : 93

Laphystia Loew

Laphystia Loew, 1847: 538 .

Species Found in Wyoming: Laphystia canadensis , L. confusa , L. flavipes , L. notata , L. rubra , L. rufiventris , and L. rufofasciata .

Key to Species [adapted from Curran (1931); ( Wilcox 1960)]

1 Abdominal segment 1 and/or 2 with the pollinose fasciae entire or nearly so, or these segments wholly or largely pollinose. 2

- Abdominal segments 1 to 5 with the pollinose fasciae broadly interrupted........................................ 4

2 Scutellum with long marginal setae of bristles................................................. Laphystia flavipes

- Scutellum with short, recumbent setae only................................................................. 3

3 Femora wholly yellow; tibiae yellow except at tip; fasciae on abdominal segments 4 and 5 broadly interrupted................................................................................................. Laphystia confusa

- Fore femora at least largely black on dorsal surface; fasciae very narrowly interrupted on abdominal segment 4, interrupted by about 1/4 width of abdomen on segment 5................................................ Laphystia rufofasciata

4 Scutellum entirely pollinose.............................................................................5

- Scutellum with only narrow posterior margin bare of pollen.................................................... 6

5 Mesonotum of male with bare area divided by the medial pollinose stripes, female only with bare spots behind suture; generally basal one-fourth or less, of hind femora orange to reddish..................................... Laphystia canadensis

- Mesonotal setae anterior to suture as long as first antennal segment in males, in females only dorsal central rows; basal half or less of hind femora reddish.................................................................. Laphystia notata

6 Legs black, very narrow apices of femora and narrow bases of tibiae yellowish; claws black, basal 1/3 reddish; abdominal segments 4–6 yellowish red, basal segments brown to black; fasciae broadly interrupted on all segments.... Laphystia rufiventris

- Femora and at least basal 1/4 of tibiae reddish brown, dorsum of femora mostly black; claws black, reddish basally; abdomen reddish brown, fasciae usually entire on segments 1, 2, and 6, but sometimes indistinct on 1 and2, and narrowly interrupted on 6....................................................................................... Lahystia rubra