190 Trans. Acad. Sci. of St. Louis. 



moderately long, very slender and filiform, with the first four 

 joints decreasing rapidly in length, the first almost as long as 

 the next two combined, the fourth short, very oblique, ex- 

 tending slightly under the base of the fifth which is barely 

 as long- as the first and much more slender. The single 

 widely disseminated species is not rare under old leaves and 

 rubbish and may be defined as follows : — 



Moderately stout, somewhat convex, parallel, pale flavo-testaceous through- 

 out, sometimes feebly picescent beneath and on the abdomen; surface 

 feebly alutaceous from a very minute reticulation, the elytra and 

 abdomen rather more shining and sparsely punctate, the former some- 

 what coarsely and subrugulosely, the head and pronotum not finely but 

 extremely feebly and subobsoletely punctate; head well developed, 

 somewhat wider than long, the sides parallel and nearly straight, the 

 angles right and rather narrowly rounded; eyes moderately large; 

 antennae short, about a fourth longer than the head in the female; 

 prothorax distinctly narrower than the head, slightly transverse, dis- 

 tinctly obtrapezoidal, the sides straight, the angles obtuse and moder- 

 ately rounded; elytra large, quadrate, much larger than the head, a 

 fourth wider and one-third longer than the prothorax, parallel, the 

 sides nearly straight, the basal angles right, but slightly rounded and 

 rather widely exposed at base; abdomen parallel with the sides feebly 

 arcuate, fully as wide as the elytra, the segments short, the fifth longer 

 as usual. Length 2.0 mm. ; width 0.45 mm. Texas (Austin, Houston 

 and Brownsville) and Florida (Enterprise) testacea Csy . 



The specimens in my cabinet are females and I am there- 

 fore unable to describe the male, the secondary sexual charac- 

 ters of which are presumably very simple. 



Scopaei. 



The moderately numerous genera of this subtribe are com- 

 posed on the whole of the smallest and most delicate species 

 of the Paederini. They are especially developed in the 

 American continents and comparatively poorly represented in 

 the palaearctic regions. Some of the American genera are 

 notable because of the elaborate secondary sexual modifica- 

 tions of the male, which in several cases such as Scopae- 

 opsis, affect every segment of the abdomen. In many in- 

 stances these secondary sexual characters extend to the entire 

 form or relative sizes of the head, prothorax and elytra, as in 



