1890] MARYLAND ACADEMY OF SCIENCES. 81 



Length to tip of venter, 6-6^ millims ; to tip of membrane, 

 7-7 J millims. Width of base of pronotum, If millims. 



Specimens have been collected for me in various parts of the 

 United States. Mr. Ashmead has taken it in Florida. Dr. 

 Melsheimer gave me a specimen from York County, Pa., where 

 it lives on Carya alba during the latter part of May. I have 

 seen a specimen from central Illinois, and I have taken a single 

 specimen in the vicinity of Baltimore. Mr. Belfrage also cap- 

 tured a pair in the vicinity of Waco, Texas. 



2. X. sGittellatus. New sp. , 



Elongate, subcylindrical, deep black, dull above. Head 

 vertical, blunt, short, moderately polished, face below the ver- 

 tex brown piceous, vertex with a faintly impressed longitudinal 

 line, eyes brown ; antennae blackish piceous, the basal joint 

 pale interiorly, incisures of all the joints pale, the base of the 

 third joint whitish. Pronotum black, apparently bald, min- 

 utely transversely wrinkled, the anterior lobe contracted, cylin- 

 drical, the posterior lobe wide convex, with the humeral angles 

 subacute. Pectus black, polished, with a pale piceous streak 

 on the forward margin of the middle coxae. Legs dark piceous, 

 paler at the joint of the tibiae, the posterior coxae white. 

 Apical lobe of the scutellum ivory white, basal lobe black, min- 

 utely scabrous. Hemelytra black, minutely pubescent, with 

 the costal margin nearly straight, and a narrow white band 

 (sometimes absent) across the base of the cuneus ; membrane 

 black. Venter black, highly polished. 



Length to tip of venter, 6-7 millims ; to tip of membrane, 

 7-8 millims. Width of base of pronotum, IJ millims. 



A very common species in Illinois, and not uncommon in 

 Massachusetts, New Hampshire, Connecticut and Ontario, 

 Can. It has also been taken in Maryland, North Carolina and 

 Virginia. 



JRhinocapsus. New gen. 



Oblong-ovate, highly polished ; head moderately appressed, 

 slanting forwards ; vertex almost quadrangular, transverse, a 

 little convex ; the face abruptly contracted, with the tylus very 



