1918] Revision of the Genus Sciara 325 



1. Clasper globular or suliglobular. 



m. Thorax subopaque, not very shiny, 

 n. Clasper with a single stout spine, subapical in 

 position, longispina n. sp. (Fig. 116). 



(Sp- 27 Joh.) 

 nn. Clasper with no stout spines (Fig. 22). Wing 



(Fig- 53) 22. ericia n. sp. 



mm. Thorax very shiny. Clasper subglobular. (Fig. 



123) Itigens Joh. 



11. Clasper not globular or subglobular. . 



m. Clasper with a stout apical or stout subapical spine. 



n. Clasper with several subapical, slender, rather 



long spines (Fig. 131). R., ends about opposite 



the tip of M2 (Fig. 250). Mesonotum highly 



polished acuta Joh. 



nn. Clasper with no subapical, slender, long spines. 



Rs ends considerably proximad of the tip of M2 



(Fig. 54). 



o. Stout spine .subapical (Fig. 67). (See plate, 



this key). Media forks distad of tip of Cu?; 



Rs almost straight, only slightly curved at 



tip and usually distant from Mi. . . Jiartii Joh. 



00. Stout spine apical (Fig. 23). 



p. Cu petiole less than half the length of the base 

 of M. Distance from point on costa oppo- 

 site the base of Rg to the tip of Ri greater 

 than the distance from the tip of Ri to a 

 point on costa opposite the forking of M. 

 Branches of M considerablv diverging 

 Wing (Fig. 54). Clasper (Fig.' 23). 



23. penna. n. sp. 

 pp. Cu petiole at least half the length of base of 

 M. Distance from point on costa opposite 

 the base of Rs to the tip of Ri not greater 

 than distance from tip of Rj to a point on 

 costa opposite the forking of M. Branches 

 of M only slightly diverging. Wing (Fig 

 56). Clasper (Fig. 25). . .25. hamata n. sp 

 mm/. Clasper with no stout apical or subapical spine 

 Halteres luteous. Wing (Fig. 61). Cla.sper (Fig. 30) 

 . 30. perfecta n. sp 



nil. Petiole of cubitus at least half as long as the basal section of M 

 1. Rs ends proximad of .85 of the length of the wing, 

 j. Clasper with 2 strong apical spines (Fig. 118). Wing veins 

 strongly defined (Fig. 238). Thorax shining black. 



par His Joh. 

 jj. Clasper and wmg of different structure. 



k. Costa produced less than two-thirds of distance from 

 Rs to Ml. 

 1. Clasper with one or more stout apical spines. 



m. Wing narrow (Fig. 240). Clasper with one stout 

 apical spine; hypopygium with an indistinct basal 

 cluster of set« on the mid- ventral line (Fig. 120). 



sativae Joh. 

 mm. Wing wider (Fig. 267). Clasper with 3 apical 

 spines; hypopygium with no trace of basal cluster 

 of setae on the ,mid-ventral line (Fig. 261). 



cucumeris Joh. 



11. Clasper with rio stout apical spines, with one long 



slender subapical seta. (Fig. 24). Wing (Fig. 55). 



24. poll ids n. sp. 



