66 GEO. H. HORN, M. D. 



The variation observed in this species are of but little moment, 

 and have been recorded in the description. Under this description 

 Crotch was disposed to unite several others, assuming that the differ- 

 ences in color were merely varietal, but as these differences are sup- 

 plemented by others, the sexual often being important, the species 

 recognized by LeConte must be admitted. 



Occurs on the Atlantic coast from Long Island to Florida, usually 

 very abundant. 



T. brevicollis Lee, Proc. Acad. 1865, p. 221. — Form rather more broadly 

 oval thau usual. Autenuse piceous, the underside of the three basal joints tes- 

 taceous. Head dull yellowish testaceous with a small occipital piceous spot, sur- 

 face nearly smooth, a few indistinct coarse punctures at middle of the vertex. 

 Thorax more than twice as wide as long, slightly narrower in front, sides ob- 

 tusely angulate, disc irregular, with a moderately deep oblique impression each 

 side, the two meeting opposite the scutellum, surface sparsely indistinctly punc- 

 tate, more evidently near the front angles; scutellum pale, piceous at apes; 

 elytra dull yellow, with a common sutural piceous vitta broad at base, gradually 

 narrowing to apex, a broad vitta from the humerus extending nearly to tip and 

 joining the sutural by a narrow isthmus ; surface closely and finely punctate, 

 finely pubescent; epipleurfe, piceous, except at humerus. Body beneath dull 

 yellowish testaceous, the ventral segments with small piceous space at sides; 

 femora yellow, tibite on the outer side and tarsi piceous. Length .31 — .38 inch. ; 

 8.5—9.5 mm. 



Male. — Last ventral segment with a broad and moderately deep emargination ; 

 anterior tarsi very slightly dilated. 



Female. — Last ventral entire. 



This species resembles canadensis, but is known by the short and 

 broad thorax, the black tibiae and tarsi, and the usually black epi- 

 pleurse. 



The variations are not great. The occipital spot is often indis- 

 tinct. The piceous spots on the thorax are never conspicuous, and 

 the middle one may be obliterated and the lateral small. The epi- 

 pleurse are usually black, except at base, but one specimen has been 

 observed with the piceous color at apex only. The fifth joint of the 

 antennae is scarcely longer than the third. The tarsal claws are 

 similar in the sexes, being rather widely bifid at apex, the inner 

 portion slightly shorter, and at the same time divergent from the 

 outer. 



Occurs on the sea-coast from Florida to Texas. 



T. Tirgata Lee, Proc Acad. 1865, p. 220. — Oblong oval, less elongate than 

 fomentosa, but narrower than brevicoUis. Anteunie piceous externally, gradually 

 paler to base, esjiecially on the underside of the joints, fifth joint nmch longer 

 than the third, the second and third together, but little longer than the fourth. 



