UMer.] 438 [April 17, 



long as the second. Rostrum stout, hairy, extending beyond the 

 basal line of the prosternuni. Pronotum ample, (in the unwinged 

 form narrow and short, with the mesothorax forming the largest di- 

 vision of the body) a very little wider tjian 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 

 (including the humeri) constituting high, broad ridges. Anterior 

 lobe much narrower than the head across the eyes, the lateral mar- 

 gins and submargins 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 oc- 

 cupying nearly the whole width; the nervures very prominent, mem- 

 brane more than twice as long as the corium, having a submarginal 

 nervure running around the entire circumference, following equally 

 the curve of the tip, a longitudinal suture extends along the middle 

 quite to the tip. Abdomen broad and short ; the penultimate ventral 

 segment of the female concavely curved on the posterior margin . 

 M. hesperius. 



M. hesperius Uhler, Proc. Bost. Soc. N. H., 1871, p. 109. 



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; ros- 

 trum black, shining beneath, densely grayish pubescent above, more 

 or less' orange at base. Antennas black, pubescent, the basal fourth 

 of the first joint orange. Pronotum very small in the unwinged spec- 

 imens, 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 



