June 1899.] Casey: On American Coccinellid^e. 123 



moderately wide internally rounded yellow marginal spot, the head apparently 

 black in both sexes. Length 2.0-2.7 mm.; width 1. 6-2.0 mm. Rhode Island, 

 Pennsylvania, North Carolina (Asheville) and Indiana — also a specimen from 

 Las Vegas, New Mexico, which represents a slight variety [trinifer n. v.), still 

 more broadly oval, with yellow elytral spots, the two posterior but little smaller 

 than the anterior proba Say 



Elytra each with a large elongate pale spot along the margin, extending from a little 

 behind the middle to apical fifth or sixth of the edge, internally rounded in out- 

 line, the apical edge narrowly picescent thence to the sutural angle, also with a 

 large oval spot, slightly longer than wide, just before the middle at inner two- 

 fifths ; pronotum black, with a very broad internally rounded marginal pale spot 

 and narrow pale apical margin ; head entirely pale ; pale areas very pale straw 

 color throughout ; legs throughout and posterior half of the abdomen pale, the 

 latter dusky toward the middle. Length 2. 15 mm.; width 1.7 mm. Texas 

 (Brownsville) rotunda, sp. nov. 



8 — Elytra with a parallel marginal vitta extending from basal fifth to three-fifths of the 

 length and more than twice as long as wide, also with a large and rounded but 

 antero-laterally sinuato-truncate spot near the apex, equidistant from margin and 

 suture, and a large oval and feebly oblique spot at basal third, less than half as 

 far from the suture as from the margin ; head pale ; pronotum with a very broad 

 and internally angulate pale margin and a narrow pale apical margin joining the 

 lateral pale areas, the latter yellowish-white throughout ; punctures moderately 

 distinct ; under surface black throughout, the legs in great part pale. Length 

 2.2 mm.; width I 6 mm. Texas (Brownsville) — Mr. Wickham. 



gemma, sp. nov. 



Elytra without a marginal vitta but with a rounded pale spot at or near the middle.. 9 



9 — Marginal pale spot just before the middle ; each elytron also with another similar 

 in size near the apex and very near the edge, less than half as far therefrom as 

 from the suture, also with a slightly larger rounded spot a little before the middle 

 and half its width from the suture ; head pale ; pronotum black, with a broad 

 marginal spot as wide as long, broadly rounded internally, the apex not at all 

 pale ; punctures quite deep and strong but only moderately close-set ; under sur- 

 face of the hind body black, the abdomen pale at the limb throughout ; legs very 

 pale throughout ; ornamentation yellowish-white. Length 1.8-2. 1 mm.; width 

 1. 4-1. 6 mm. Texas (Brownsville) — Mr. Wickham medialis, sp. nov. 



Marginal pale spot slightly behind the middle small, each elytron also with a still 

 smaller transversely oval subapical spot, almost as far from the margin as from 

 the suture, and a small rounded discal spot, distinctly before the middle and 

 slightly nearer the suture than the margin ; head pale ; pronotum with a narrow 

 pale lateral margin slightly narrowed to the base, the inner margin straight ; 

 apex not pale, the pale areas reddish-yellow ; punctures fine ; under surface 

 black, the abdomen paler at the edges, broadly behind ; legs in great part 

 piceous. Length 2.3 mm. ; width 1.8 mm. Arizona (Benson) — Mr. Dunn. 



triangulum, sp. nov. 



IO — Discal spot of each elytron irregular in form, red, extending from basal fourth to 

 apical fifth and from inner to outer fourth of the width, obliquely truncate an- 



