114 THE UNIVERSITY SCIENCE BULLETIN. 



largest division of the body), a very little wider than long, the posterior 

 lobe large and extending back in the form of a broad triangle, with the 

 sides nearly straight and the tip a little rounded; lateral margins (in- 

 cluding the humeri) constituting high, broad ridges. Anterior lobe much 

 narrower than the head across the eyes, the lateral margins and submar- 

 gins lobately elevated. Anterior legs stout, the tibiae a little curved at 

 tip, with the process small and almost in contact with the surface on 

 which it is situated; basal joint of tarsi about one-fourth the length of 

 the second, the second carrying the unguiculi about one-third of its length 

 from the tip. Intermediate femora about two-thirds the length of the 

 posterior; the tibia not quite as long as the posterior femur and tibia 

 conjoined, but equal in length to the distance from the base of head to 

 the tip of the intermediate femur; tarsus equal in length to the posterior 

 tibia and tarsus conjoined ; hemelytra not covering the whole width of 

 mesothorax, but much longer than the body; corium short, having two 

 elongated cells occupying nearly the whole width; the nervures very 

 prominent, membrane more than twice as long as the corium, having a 

 submarginal nervure running around the entire circumference, follow- 

 ing equally the curve of the tip, a longitudinal suture extends along the 

 middle quite to the tip. Abdomen broad and short; the penultimate ven- 

 tral segment of the female concavely curved on the posterior margin." 



Metrobates hesperius Uhl. 1878. 



Uh!,, Proc. Boston Soc. Nat. Hist., vol. XIX, part IV. p. 1438. 



"Opaque, velvety blue-black, or brown-black, densely pubescent, robust, 

 the mesothorax very large and composing the larger part of the body. 

 Head convex, robust, brown, at base rufous, or orange, the anterior part 

 of which is invaded by a rounded spot of the black surface extending 

 from the face; minutely, densely pubescent; rostrum black, shining be- 

 neath, densely grayish pubescent above, more or less orange at base. 

 Antennae black, pubescent, the basal foui^th of the first joint orange. 

 Pronotum very small in the unwinged specimens, less than one-half as 

 long as wide, having the anterior margin a little concave; the surface 

 closely, finely pubescent, the anterior lobe with a yellow, depressed spot 

 on the middle, covered by a more or less wide gray, or lead-blue middle 

 line, which color expands and covers the whole width of the tergum to its 

 tip, omitting only a few black streaks on the disks and margins of the seg- 

 m-ents. The whole breast, venter, and two spots on the pleura lead color, 

 with a sericeous gloss. 



"The winged form has the pronotum blackish brown, densely pubes- 

 cent, the middle of the anterior lobe broadly depressed, covered by an 

 orange spot, lacking the bluish stripe. Coxae yellow beneath, legs brown- 

 ish black, the anterior pair yellow at base, and on the under side the 

 yellow is a little farther extended. Sternum blackish, each side of it yel- 

 lowish. Hemelytra dark brown, with a faint paler streak on the medial 

 suture, the base and costal margin pubescent. Venter cinereous, the disk 

 of the penultimate and base of the last segment yellow. 



"Length to tip of hemelytra, 5 mm.; extreme width of mesothorax, 

 2 mm.; unwinged — length, 3 to 4 mm.; width of mesothorax, 1% to 

 21/4 mm." 



Reported for Ontario, Maine, Massachusetts, Rhode Island, New York, 

 Maryland, North Carolina and South Carolina, according to Van Duzee. 



Genus TREPOBATES Uhler. 



"As the name of this genus is preoccupied, and the genus has not yet 

 been fully described, for lack of winged specimens, it becomes necessary 

 to give the following characters, which are in augmentation of those 

 given by Dr. Buchanan-White: Anterior tarsi normally three-jointed 

 (exceptionally two-jointed) ; the hemelytra curved and tapering at base, 



