UHLER ON INSECTS. 393 



joint longest, slightly compressed; third a little longer than ♦^he fourth; 

 the fourth shortest, slender. Pronofcum almost twice as broad as long, 

 finely punctured along the sides and posteriorly, very little narrower 

 before, the lateral margins a little curved inward toward the anterior 

 angles, the edge recurved ; the anterior angles subacute, each having a 

 minute sunken point atljoining the margin ; each side of the sinuation 

 of the anterior margin is a similar sctiiken point. Just interior to the 

 humeral angles is an impression which runs forward to before the mid- 

 dle, and bears a number of coarser confluent punctures. Legs dark 

 piceous, or a little rufopiceons ; the anterior femora with a minute pro- 

 tuberance below, near the apex, minutely spiaulose ; anterior tibise very 

 slightly compressed, moderately spinous, the posterior pair long and 

 slender; tarsi testaceous, or ferruginous. Scutellum long, acutely nar- 

 rowing, the tip acutely rounded, minutely punctured, the lateral im- 

 l)ressed line slender, shallow, distinctly punctured ; the base convexly 

 elevated transversely, almost impunctured, its base with a deeply im- 

 pressed, transverse, slender, punctured line. Corium about three quar- 

 ters of the length of venter, not as broad as in the preceding species, 

 finely, distinctly punctured, the impressed sutures with rowsof somewhat 

 larger punctures; costal margin very slightly curved at tip; the pos- 

 terior margin more acutely oblique than in the preceding, straight, the 

 outer tip not produced, very acutely rounded ; membrane whitish, not 

 half as long as the corium, with two or three very indistinct nervures. 

 Venter smooth, shining, very minutely punctured; the coanexivuju 

 longitudinally broadly impressed, remotely ciliated, the edge sharp and 

 thin. 



Length 2i-3 millimeters. .Width of pronotum l\ millimsters. 



Hab. — Cuba and Chili, Dr. Signoret. 



I am indebted to the kindness of Dr. Signoret, of Paris, for a pair of 

 specimens of this interesting little species. 



4. M. elongatus. 



Mdancethus elongatus Ubler, Bull. U. S. Geol. Surv., vol. ii, No. 5, p. 14. 



Deep black, shining, elongateov d, the sides very parallel. Head 

 semicircular, a little convexly rounded on the cranium, densely punet- 

 nred, remotely punctured at base ; submargin broadly depressed, re- 

 motely ciliated, the margin recurved; tylus very short, reaching as far as 

 the tip of lateral lobes, a little cylindrically elevated, minutely rugulose; 

 each side of tylus and adjoining each eye with a small sunken point. 

 Anteunre stout, dark piceous ; the joints paler at base and tip, the second 

 joint most slender, shorter than the third ; the third enlarging to the 

 tip, a little shorter than the fourth ; fifth longest. Rostrum not quite 

 reaching to the intermediate coxte, rufo-piceous ; the second joint 

 longest, a little compressed ; the third a little shorter ; fourth shortest. 

 Pronotum subtrapezoidal, fully twice as broad as long, the lateral 

 margins anteriorly very slightly oblique, more suddenly rounded at the 



