240 J. L. HANCOCK. 



often gives greater prominence to the dorsal hump in front as well 

 as making the lateral angles appear stronger, giving specimens a 

 very unique appearance. 



Riverside and Rivergrove, 111. 



7. T. fluctuONUM sp. n. (Plate VII, fig. 6, 6a). — Cephalo-dors:al outliue as in 

 fig. 27, plate ix. Allied to T. gibbon us ; vertex in profile produced into a small 

 pyriforni prominence in advance of the upper part of the eyes; frontal costa 

 deeply notched opposite the eyes: the vertex above is about equal to the combined 

 width of the eyes, flattened and shallowly sunken in front each side of the 

 scarcely distinguishable mid-carina, the latter just appearing at the cut-off front 

 border; pronotum truncated in front, flattened on dorsum, rather broad with an 

 anterior dorsal elevation between the shoulders, depressed behind, lateral angles 

 strong, sharply carinated and projecting laterally over the base of the tegtuina, 

 lateral borders of process compressed, apical process tapering and concavely 

 curving to the end. not reaching the end of the wings. In front the pronotum 

 is constricted, corrugated and deeply depressed each side of the dorsal hump, 

 formed into an angular pit pointing inward in the humeral portions; median 

 carina not distinct, its course behind the dorsal eleviition from before backwards 

 broken by a succession of very small gradually decreasing protuberances fre- 

 quently granulated upon their summits; lower border of lateral lobes diverging 

 and rounded posteriorly below. Body covered with granulations frequently light 

 in color interspersed with tubercles on the dorsum. Elytra oblong, granulated 

 and punctate ; angles everywhere accentuated in this form. Length of body 9 . 

 13 ram. ; pronotum 9, 11.5 mm. 



Riverside and Rivergrove, 111. 



Here, as in most of the other forms enumerated, a short-wing 

 form is encountered and assigned a place in plate vii, fig. Gb, and 

 the cephalo-dorsal outline is figured in figure 27a, plate ix ; vertex 

 similar to T. Jiactuosus. The })ronotum varies extremely. A speci- 

 men which forms the basis of these remarks has the dorsal elevation 

 gracefully molded, raised as usual, but with five granulated protu- 

 berances marking the course of the median carina of nearly equal 

 size. The wings do not extend as far as the end of the pronotum, 

 the latter is almost straight on the sides terminating by an acute 

 point decurved, distorted and not reaching the })osterior knee. 



8. T. <lec'oratus sp. n. (Plate VII, fig. 7, 7a). — Cephalo-dorsal outline as in 

 fig. 31, i)late ix. Nearly allied to T. glbbosm and flactuosm ; small in stature: 

 vertex produced much like fluduosus, uiid-cjxrina indistinct, scarcely to be seen 

 at the cut-off front border; the face is proportionally large; dorsum flattened, 

 with an anterior hump. Wings extending a little beyond the end of the pro- 

 notum ; easily mistaken for T. ornatiis, which it resembles nearly in size, but dis- 

 tinctly different structurally. Length of body f'Hu^ni- 



Chicago, Riverside and Rivergrove, 111. 



