414 Dr. J. L. Hancock's Further Studies of 



5. T. granulata, Kirby, Fauna Bor. Amer. Ins. p, 251, 

 1837. 



One female example from America (in all probability 

 N. America) in the University Museum, Oxford. 



The following species of American Tctrix and Nomo- 

 tcttix are characterized by an obtuse-conical profile to 

 head ; the frontal costa between the eyes not at all or 

 barely excavate. These insects are labelled briefly " Amer. 

 b." which Mr. Shelford interprets as America borealis. 



6. T. amcricaoia, sp. nov. 



A robust long-wing form of the granidata series ; body granulate, 

 the vertex not so angulate produced as usual, but formed in an obtuse- 

 rounded angle in profile and not at all or indistinctly sinuate between 

 the eyes ; colour dark variegated with fuscous. Head not exserted ; 

 vertex wider than one of the moderately sized eyes, equal to about one 

 and a half times, little narrowed forward, the front margin somewhat 

 angulate but not so produced as in granulata ; frontal carinulse 

 rounding posteriorly into the sides, little compressed ; median carina 

 compressed, extended the length of vertex, in profile elevated above 

 the eyes and produced and rounded anteriorly ; frontal costa divid- 

 ing behind the posterior ocelli near the apex, rather widely sulcate, 

 the rami evenly divergent, in profile not at all sinuate between tlie 

 eyes or rarely subexcavate, the facial costa strongly advanced beyond 

 the eyes ; posterior ocelli consjiicuously placed free in advance of the 

 middle of the eyes. Pronotum granulate, truncate anteriorly, 

 j)osteriorly subulate, the process extended beyond the apices of the 

 posterior femora ; dorsum tectiform, somewhat broad between the 

 humeral angles ; median carina little compressed percurrent, some- 

 what arcuate forward nearly straight posteriorly ; lateral carin&e 

 moderately expressed ; prozonal carinse slightly expressed and sub- 

 divergent posteriorly ; lateral lobes having the posterior sinus above 

 shallow ; posterior angles rounded. Wings fully explicate ; elytra 

 oval, the apices rounded. Femoral margins entire ; the first articles 

 of the posterior tarsi nearly twice the length of the third ; the third 

 pulvilli flat below and equal in length to the first and second, acute. 



Length of body entire, female, 15 mm. ; pronotum 11"8 mm. ; 

 posterior femora 5*6 mm. ; wings passing the pronotal apex 2 mm. 



One example from " Amer. b." North America ; W. W. 

 Saunders' collection, presented by Mrs. F. W. Hope to 

 the University Museum, Oxford. 



