8 THE CANADIAN ENTOMOLOGIST 



marked in the <t , but often indistinct in the $ . Disk of the inner face 

 black, with two light bands, a median and a preapical ; the upper sulcus 

 with an additional light band near the base ; lower sulcus black, with one 

 preapical light band. Hind tibiae pale yellow. 

 Length of body, £ 20 mm., 9 27 mm. 



'• " antenna, ^ 10 mm., 9 9-5 tnm. 



" " head and pronotum, $ 7 mm., $ 8.5 mm. 



" " tegmen, ^22 mm., $ 27 mm. 



" " hind femora, <$ 11 mm., $ 13 mm. 

 Described from twenty-one <$ 6 > fifteen $ $ , Southampton, Ont. 

 Aug. 20, 21 and 29, 1901. 



This species is closely allied to T. vinculata and T. saxntilis, Mc- 

 Neill, but I am satisfied that it is distinct from both. Mr. Scudder, to 

 whom I sent a pair, gave his opinion that they agreed slightly better with 

 McNeill's description of sax at His than with vinculata, but was unable to 

 decide whether it should be referred to the former or not. I tried to obtain 

 specimens of saxatilis for comparison, but was unsuccessful. Neverthe- 

 less, after comparing my series with McNeill's rather brief description of 

 saxatilis, I find that there are points of difference that seem to be 

 constant. These are as follows : 



In saxatilis the metazone of the pronotum is not more than one and 

 three-quarter times as long as the prozone ; in huroniaua it is in every 

 specimen in my series fully twice as long as the prozone, and sometimes 

 slightly more. In saxatilis the tegmina, though variable, are usually very 

 strongly varied with fuscous, and when nearly plain it is by the suffusion 

 of the ground colour with fuscous. In huroniana the tegmina are only 

 occasionally strongly varied with fuscous, and when plain it is not through 

 suffusion, but merely from absence of the bands ; in other words, it is the 

 darker specimens of saxatilis that have plain tegmina, whereas it is the 

 lighter specimens of Jiuroniana. The wings in saxatilis are relatively 

 shorter than in vinculata, being considerably less than twice as long as 

 broad. In huroniana, on the other hand, they are identical in form with 

 those of vinculata, and the wing band is as narrow as in that species, 

 whereas it is broader in saxatilis. 



It may also be mentioned that saxatilis in Arkansas is found only on 

 rocky ground, whereas huroniana avoids rocks, being like T. maritima^ 

 partial to the sandy beaches, close to the water's edge. 



