Coleopterological Notices, V. 359 



as wide as the prothorax, nearly as in the preceding species "but rather less 

 dilated behind and with somewhat larger eyes ; upper surface broadly im- 

 pressed in the middle anteriorly, and with a small deep impression near the 

 centre, also with a deep transverse sulcus at the extreme base of the occiput ; 

 antennse nearly as in tenuissima, hut with the fourth joint less transverse, 

 tenth more than twice as wide as long. Prothorax one-tlurd wider than long ; 

 sides feebly convergent from apex to base and broadly, feebly arcuate ; basal 

 angles very obtuse ; disk broadly, feebly impressed along the median line. 

 Elytra quadrate, distinctly wider and two-fifths longer than the prothorax ; 

 humeri obliquely rounded to the prothorax and slightly visible. Abdomen 

 scarcely as long as the anterior parts, very little narrower than the elytra; 

 sides subparallel, the tip of the fourth segment scarcely visibly wider ; fifth 

 slightly longer than the fourth; border moderate. Length 1.1 mm.; width 

 0.2 mm. 



Texas (Galveston). 



This infinitesimal animal seems to be widely diffused, for I have 

 taken specimens, either of it or of a species so similar as to be 

 almost uudistinguishable with my present material, also at Austin 

 and Waco in Texas, and Tucson in Arizona. The transverse 

 sulcus at the occipital base receives the anterior margin of the 

 pronotum when the head is thrown back. 



T. demissa n. sp. — Minute, slender, rather convex, strongly shining 

 throughout, the abdomen still more polished, black, the pronotum feebly 

 picescent, the elytra still paler, rufescent ; antennse black, piceous toward 

 base ; legs pale flavate ; anterior parts finely but not strongly reticulate, 

 minutely, subobsoletely punctate, the elytra scarcely more distinctly so, the 

 abdomen very minutely, sparsely and subgranularly ; pubescence short, rather 

 sparse, not conspicuous, very sparse on the abdomen. Head large, rather 

 longer than wide, fully as wide as the prothorax, the sides parallel ; eyes at a 

 little more than their own length from the base ; surface deeply concave along 

 the middle anteriorly, and with a deep conspicuous fovea at the centre ; 

 antennae short, feebly incrassate, scarcely visibly longer than the head and 

 prothorax, the basal joint thicker and nearly as long as the next two, second 

 longer than wide and nearly as long as the third and fourth, constricted at 

 base, outer joints distinctly transverse. Prothorax not more than one-fourth 

 wider than long ; sides broadly arcuate, becoming gradually almost straight 

 and slightly convergent in about basal half; apical angles deflexed and 

 broadly rounded ; basal obtuse and more narrowly rounded ; base broadly 

 arcuate, scarcely as wide as the apex ; disk convex, narrowly and rather 

 strongly impressed along the median line throughout. Elytra much shorter 

 than wide, toward apex distinctly wider than the prothorax, not longer, the 

 sides feebly divergent from the slightly exposed humeri. Abdomen, contracted, 

 subequal to the anterior parts, at base distinctly narrower than the elytra ; 

 sides straight and just perceptibly divergent from the base, the apex of the 



