MCNEILL REVISION OF THE TRUXALINjE OF NORTH AMERICA. 201 



The median carina of the head is faint upon the posterior part of the 

 occiput. The transverse sulci of the pronotum are obsolete except the 

 principal one, which is barely visible as cutting the median carina. 

 The lateral carinre are not cut by any incision. The tegmina are about 

 as long as the pronotum, very narrow, bluntly pointed and separated 

 by a space nearly twice as great as their width. The posterior femora 

 are very much (male) or decidedly (female) shorter than abdomen, 

 very little expanded at the base. The spines of the posterior tibite are 

 minute and very numerous, being about 25 on the outside. The supra- 

 anal plate of the male is five times as long as the last abdominal seg- 

 ment and projects far beyond the abdomen. 



Tnixalis /frevipe finis, Tho?,., 1873. Syn. Acrid. N.Am. ,58, pi. fig. 12. 

 Achurum brevipennis, Scud, 1877. Ent. Notes, VI, 29. 



Hab. This species has been reported only from Florida, where it is 

 probably not uncommon in suitable situations. According to Scudder 

 it is common about Fort Reed, Fla. I have specimens from Orange, 

 Fla., and the National Museum contains a female, which seems to be 

 Thomas' type, and a single male without a label. 



II. ACHURUM, Sauss. Fig. 2. 



Sexes not very unequal in size, very slender, with the head longer 

 than the pronotum and the face approaching horizontal. The vertex 

 is much longer than wide with the sides parallel and the front rounded, 

 extending in front of the eyes a distance equal to their length. It is 

 convex with a plain median carina. At the sides it is somewhat lam- 

 ellate and horizontally extended. The frontal costa is a high, nar- 

 row ridge just below the vertex. A short distance below, it becomes 

 sulcate and the sides are slightly divergent to the ocellus, below which 

 they diverge with increasing rapidity and reach the clypeus. The 

 face, seen from the side, is distinctly sinuate. The lateral foveolae are 

 distinctly linear and are separated from the face by a delicate carina. 

 The eyes are long, elliptical, nearly horizontal and near the middle of 

 the head. The antennae are much flattened, triquetrous, regularly 

 acuminate, and shorter than the head and pronotum. The pronotum 

 is plain above with the three carina distinct and parallel ; they are 

 cut by the principal sulcus much behind the middle. The posterior 

 margin of the metazone is roundly angulate. The lateral lobes of the 

 pronotum are vertical and distinctly higher behind with the anterior 

 and posterior borders much inclined, the latter sinuate and the lower 



