CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 363 



Discussion. — The original description and its accompanying 

 illustration both call attention to the whitish lateral margins of the 

 pronotum and corium. In addition, the illustration shows the 

 elongate pale marks on the dorsal faces of the tibiae and shows the 

 corium to be without the angled pale spot at the apex of the radial 

 vein of the corium. Thus the name ductus of Palisot de Beauvois 

 can apply only to the present form. Say's description of Cydnus 

 ligatus is equally detailed in describing the pale markings that are 

 present and in pointing out that the pale corial maculations, other 

 than the costal margin, are lacking. Thus his species also can apply 

 only to this form and so must be considered a synonym of cinctus, 

 which was described 26 years earlier. 



As is the case with subspecies albonotatus, the above-ground habits 

 of this form have permitted observational access to parts of the life 

 history of cinctus cinctus. The same general type of life history is 

 evident with overwintering adults (Hart, 1919) possibly breeding on 

 labiates and adults frequenting a variety of plants^ — sweet clover, 

 Stachys sp., Monarda imnctata (Hart, 1919); raspberry (Frocschner, 

 1941); raspberry, wild cherry, and grasses (Blatchley, 1926). 



Sehirus cinctus texensis, new subspecies 



Diagnosis.- — The creamy white dot at the apex of the radial vein 

 of the corium plus the shorter head (anteocular length less than half 

 of anteocular width) will quicldy separate this subspecies from the 

 other two. 



Description. — Male : 



Head: Wider than long, 1.14(1.10-1.16) :0.87(0.86-0.90); ante- 

 ocular length little less than half of anteocular width, 0.34(0.33-0.36): 

 0.75(0.73-0.76); juga narrowly and lowly reflexed, punctured nearly 

 or quite to edge. Antennal segments: I, 0.23(0.23-0.24); II, 0.38 

 (0.36-0.40); III, 0.47(0.46-0.50); IV, 0.63(0.63-0.66); V, 0.74(0.73- 

 0.76). Labial segments: I, 0.31(0.30-0.33); II, 0.56(0.53-0.60); III, 

 0.50(0.50-0.53); IV, 0.33(0.33-0.36). 



Pronotum: Width more than twice length, 2.47(2.35-2.53): 1.10 

 (1.04-1.17). 



Scutellum: Longer than wide, 1.83(1.75-1.89) :1.58(1.49-1.62). 



Length of body: 4.72(4.35-4.95). 



Female: Similar to male, averaging somewhat larger. 



Head: Wider than long, 1.26(1.20-1.36): 0.93 (0.80-1. 06); ante- 

 ocular length averaging less than half (45 percent) of anteocular 

 width, 0.40(0.40-0.43) :0.88(0.83-0.96). Antennal segments: I, 0.25 

 (0.23-0.28); II, 0.40(0.36-0.46); III, 0.45(0.43-0.47); IV, 0.61(0.56- 

 0.66); V, 0.71(0.70-0.76). Labial segments: I, 0.38(0.33-0.46); II, 

 0.61(0.53-0.76); III, 0.61(0.53-0.76); IV, 0.43(0.36-0.50). 



