REVISION OF STREPSIPTERA — PIERCE, 



93 



Strepsiptera, the cephalothorax should be mounted on a slide in 

 balsam. Good mounts can be obtained from dried specimens by 

 running up through water, alcohol, xylol, and cedar oil to balsam. 



The measurements are with a Bausch and Lomb stand, tube length 

 160, eyepiece 1, objective 4, with eyepiece micrometer; 1 space = 

 .01062 mm. As the comparative dimensions are the sought-for 

 characters, other microscopes will be just as available. The actual 

 size of each species may be found with its description. 



The following measurements were taken: The length is the dis- 

 tance from the base of the flattened cephalothorax to the apex of 

 the same; the distance from spiracle to apex is measured from the 

 apical edge of the spiracle ; the breadth between the mandibles is the 

 shortest distance between the same ; the breadth of the head is meas- 

 ured from the posterior lateral angles of the head, which in most 

 species is indicated by a slight convex or concave angle, and by the 

 lateral extension of the ventral slit which represents the base of the 

 head; the breadth of the cephalothorax at the spiracles is measured 

 between the outermost points of the spiracles; the greatest breadth 

 of the cephalothorax is generally equal to the preceding, although 

 it sometimes occurs behind the spiracles. 



Species. 



solidulx 



cornii 



vicinx 



grxnichcri . . 

 crawfordi... 

 salicifloris. . 

 advarians. .. 

 calif ornica . . 



imitatrix 



cressoni 



multiplkatx 

 nubeculx... 

 claytonix... 



hippotes 



sweriki 



vierecki 



bipunctatx. . 

 subcandidx. 



nasoni 



sparsipilosx . 



bruneri 



hartfordensis 

 polemonii . . . 



Length. 



130.0 

 119.0 

 113.0 

 106.0 

 104. 

 98.0 

 96.0 

 89.5 

 84.0 

 84.0 

 83.0 

 82.0 

 79.5 

 79.5 

 79.0 

 78.0 

 78.0 

 73.5 

 71.0 

 69.0 

 68.5 

 68.0 

 65.0 

 55.0 



Spiracle 

 to apex. 



90.0 

 85.0 

 78.0 

 76.0 

 76.0 

 69.0 

 69.0 

 64.5 

 60.0' 

 54.0 

 56.0 

 56.0 

 56.5 

 51.5 

 50.0 

 55.0 

 54.0 

 51.5 

 46.0 

 48.0 

 47.5 

 37.0 

 40.0 

 37.0 



Breadth 

 between 

 mandi- 

 bles. 



18.0 

 15.0 

 14.0 

 16.0 

 14.5 

 15.0 

 14.0 

 15.0 

 12.0 

 11.0 

 12.0 

 12.0 

 12.0 

 10.0 

 12.5 

 14.5 

 12.0 

 11.0 

 10.0 



9.0 

 10.0 



9.5 

 10.5 



7.0 



Breadth 

 head. 



06.0 

 69.0 

 57.0 

 61.0 

 63. 

 59.0 

 61.0 

 52.0 

 58.0 

 49.0 

 46.5 

 49.0 

 48.0 

 45.0 

 50.0 

 57.0 

 50.0 

 43.0 

 45.0 

 39.0 

 44.0 

 46.0 

 41.0 

 29.5 



Breadth 



at 

 spiracles. 



119.0 

 115.0 

 105.0 

 107.0 

 119.0 

 107.0 

 98.0 

 91.0 

 91.0 

 84.0 

 86.0 

 85.5 

 89.0 

 77.0 

 78.5 

 91.0 

 81.0 

 71.0 

 73.0 

 70.0 

 73.0 

 63.0 

 64.5 

 49.0 



Greatest 

 breadth. 



119.0 

 115.0 

 105.0 

 107.0 

 119.0 

 107.0 

 98.0 

 91.0 

 91.0 

 84.0 

 86.0 

 85.5 

 89.0 

 77.0 

 78.5 

 91.0 

 81. 

 73.0 

 75.0 

 70.0 

 73.0 

 63.0 

 66.5 

 51.0 



