370 GNATS Oil MOSQUITOES — CHAPTER XIII 



vi. The abdominal segments unhanded, but with lateral white 

 spots. 



12. S. terrens, Widker. Thorax mouse coloured, with some 



traces of white adornment. 



d. With some of the tarsi pale banded, on the articulations, i.e., two 

 joints participating in the band. 

 i. The abdominal segments, with white basal bands and lateral 

 spots. 



13. 8. signifer (Coquillett ) ? Evidently much resembles S. 



fascia ta. Position uncertain. 



iii. Some of the abdominal segments with basal white bands, but 

 without lateral spots. 



14. S. pseudoteeniata, sp. n. Thorax black, adorned with fine 



white lines, much as in S. notoscrijita. 

 V. With some of the abdominal segments banded white, alike at 

 base and apex. 



15. S. tarsalis, Coquillett. Thorax black, with linear white 



adornment, all abdominal segment with basal white bands, 

 tlie last 3 white also on the apices. 



vi. Abdominal i«gments unhanded, but some adorned with lateral 

 white spots. 



16. S. giihernatoris, sp. n. Thorax sooty, with a large anterior 



median and four smaller snowy lateral marks at the 

 corners of the mesonotum. 



€. With the tarsi unhanded. 



iii. Some of the abdominal segments with basal light bands, but 

 without lateral spots. 



17. S. microjitcra, sp. n. Thorax unadorned, black grounded 



with bronzy scales. 

 iv. Some of the abdominal segments with apical light bands. 



18. S. crassipes (Van der Wulp). Mesonotum unadorned, 



bronzy, but with white scales on the scutellum. 



19. S. irritans. Thorax dark, unadorned ; antennae of <? very 



short, 

 vi. Abdominal segments unhanded, but some adorned with lateral 

 white spots only. 

 '20. S. argenteo-2)unctata, Theobald. Thorax dark amber- 

 brown, witli 6 white spots. Scutellum with 3 white 

 patches. 



21. S. minufa, Tlieobald. Thorax black, with irregular white 



submedian lines and a pair of white spots. Scutellum 

 with a line of white scales. 



22. 8. nigricephala, Theob. Thorax nearly black, quite un- 



adorned on the dorsum, but with two wliite pleural 

 patches. Head entirely black. 



