118 GEO. H. HORN, M. D. 



A. veiltralis, n. sp. — Head black, with greenish lustre, smooth, shining, 

 front impressed. Antennae pieeous, basal joints beneath paler. Thorax one- 

 half broader than long, smooth, shining, entirely yellowish-red. Elytra black, 

 punctulate and finely rugose. Under side of thorax and abdomen yellow, 

 metasternum black with tinge of green. Hinder legs entirely black, middle 

 and anterior femora pieeous, the under side testaceous. Length .14 inch ; 

 3.5 mm. 



Resembles the two preceding in form, but may readily be known by 

 the entirely yellowish-red thorax and yellow abdomen. 



Two specimens in Cabinet of Mr. H. Ulke, from Arizona. 



PSEUDEB.EUS, n. g. 



In this genus must be placed all our species hitherto called 

 Ebsew, one of them only having been known to Erichson. The rea- 

 sons which have compelled me to confer a new generic name have 

 already been given in the preceding portion of this essay. Having 

 simple tarsi in both sexes it must be placed near Anthocomus from 

 which it differs by the prolonged elytral apices always pale in the male 

 and with an obtuse hook on the upper side. The same sex also pre- 

 sents peculiarities in the terminal segments, which will be adverted to 

 in their proper places. Abdominal segments in both sexes entirely 

 corneous. 



The species are four in number, and may be distinguished in the 

 following manner : 



Last segment of abdomen % yellow, deeply grooved longitudinally and deeply 

 emarginate at tip. 



Thorax yellow apicalis. 



Thorax black oblitus. 



Last segment of abdomen % black, not grooved, slightly emarginate at tip. 



Thorax yellow bicolor. 



Thorax black pusillus. 



P. apicalis, Say, (Malachius) Journ. Acad. Ser. i. v., p. 170; Erichs. 

 (Ebceus) Entom. 119; minutus Mels. (Malack.) Proc. Acad, ii., 305.— Black with 

 tinge of blue. Thorax and legs pale yellowish testaceous. Head pieeous or 

 black. Antennae pale testaceous, terminal joints pieeous. Thorax broader 

 than long, sides gradually narrowed to base. Elytra slightly broader at base 

 than thorax, gradually dilated behind, sinuate near the tip and prolonged in 

 the male, broadly dilated and obtusely rounded at apex in the female. Body 

 beneath black. Length .07 % ,— .09 J inch; 1.75—2.25 mm. 



Male. — Terminal abdominal segment yellow, prolonged, broadly and deeply 

 channelled and deeply emarginate at tip. 



Female. — Terminal segment one-half broader than long, sub-triangular. 

 Occurs in the Middle and Southern States. 



The males are comparatively slender in their form and the apical 

 fourth tipped with yellow. The females have the elytra much broader 



