66 The University Science Bulletin. 



Distribution. Van Duzee reports this species from Ontario, New 

 York, Pennsylvania, Michigan, Illinois, Wisconsin, and Kansas. 



Hosts. Seemingly unknown. 



The writer has not seen specimens of this species, but it is included 

 in this paper because of Van Duzee's records. 



Thelia bimaculata (Fabricius). 



(PI. V, figs. 1, 2.) 



Membracis bimaculata Fabricius, Ent. Syst., iv, p. 10, 1794. 

 Hemiptycha blnotata Harris, Kept. Ins. Mass., p. 179, 1841. 

 Hemiptycha acuviinata Harris, Rept. Ins. Mass., p. 179, 1841. 

 Thelia biinaculata Amyot & Serville, Hemip., p. 541, 1843. 

 Thelia unanimis Walker, List Homop., ii, p. 566, 1851. 



Funkhouser gives the following technical description: 



Female. Gray with indistinct darker irregular markings; porrect cylindrical 

 horn slightly flattened and somewhat darker in color at tip; tegmina hyaline, 

 apices fuscous, almost reaching extremity of dorsal process. 



Head, including eyes, twice as broad as long, grayish-yellow mottled with 

 ferruginous and brown; margins of lorae strongly sinuate; eyes dark brown; 

 ocelli white, nearer to each other than to the eyes and situated on a line drawn 

 through centers of eyes; clypeus pilose; beak extending to posterior coxae; 

 head very sparingly punctate and sparsely pilose. 



Thorax gray, deeply and densely punctate; median percurrent brown line 

 sharpened into a ridge on extremity of horn and at apex of posterior process; 

 sides of prothorax roughly and irregularly carinate; horn porrect and greatly 

 variable in length; cylindrical except at extreme tip, where it is flattened 

 laterally; posterior process heavy, tectiform, gradually acute, almost straight, 

 very slightly decurved and extending beyond apices of tegmina. 



Tegmina hyaline, apices fuscous, bases and costal regions lightly' punctate; 

 underwings hyaline, two-thirds as long as tegmina. Undersurface of body 

 gray-brown, pubescent. Legs uniform yellow-brown; femora thick and 

 smooth; tibiae and tarsi densely pilose. 



Length, 11 mm., including horn, 14 mm.; width between humeral angles, 

 5.5 mm. 



Male: Differs from female in size and' markings. Smaller, body some- 

 what less robust; porrect horn usually shorter and tending to curve; tegmina 

 equalling apex of posterior process. Color deep chocolate brown; porrect 

 horn almost black; apex of posterior process becoming cinnamon brown; a 

 wide, brilliant, lemon-yellow longitudinal stripe on each side of prothorax, 

 extending from margin halfway to median dorsal line, also small patches of 

 yellow on metopidium; head yellow with brown patches. Undersurface of 

 abdomen darker than in female. 



Internal male genitalia. Styles with anterior portion short, 

 posterior part longer, wide, and parallel-margined till near apices, 

 which are curved strongly laterad and end truncately but with a 

 distinct recurved hook, the curved apices bearing scattered short 

 hairs; connective large, rather distinctly seven-sided; oedagus, viewed 

 laterally, with a slender process to anal tube, the apical portion 



