NORTH AMERICAN OOLEOPTERA. 107 



S. nanus Lee. — Broadly oval, outline coutiiiuoiis, black, shining, anterior 

 angles of thorax often rufescent, legs reddish. Head evidently punctate. Thorax 

 narrower in front, sides arcuate, surface .sparsely punctate, equally at middle and 

 sides, basal marginal line distinct. Elytra not closely punctate, hut much more 

 coai-sely than the thorax ; prosternum slightly convex, punctate, without elevated 

 lines; metasternuni at sides closely punctate, the mesocoxal line joining the su- 

 ture oue-fourth from apex. Abdomen closely punctate, the metacoxal line form- 

 ing a complete arc nearly as long as the tirst segment. Length .05— .06 inch.; 

 1.25—1.50 mm. 



A.S in puiicfiiiit the male has the fifth ventral feebly impressed at 

 tip, the female has six distinct segments, the suture between the first 

 two ventrals is not so completely obliterated as in that s])ecies. 



The thorax may have the apical angles reddish, but never very 

 conspicuously so, but the thorax may be entirely black. This spe- 

 cies resembles puiictum closely, and the only reliable character for 

 their separation is in the form of the metacoxal line, here the arc is 

 very nearly as long as the first segment, in that but little more than 

 half. The punctuation of the sides of the thorax — coarse in punctum, 

 very fine and sparse in nanu!<, is a fairly good character, but variable 

 to an extent leading to doubt. 



Hub. — Specimens have been seen from Michigan, Middle States, 

 Florida, New Mexico, Arizona and California. 



S. utilis n. sp. — Broadly oval, convex, piceous black, shining, mouth parts, 

 antennge and legs yellow, puliescence sparse, erect. Head indistinctly punctate. 

 Thorax much narrower in front, sides feebly arcuate, basal marginal line distinct, 

 surface almost smooth, a few fine, indistinct punctures. Elytra relatively coarsely, 

 sparsely, but not deeply punctate, each puncture with a nearly erect grayish hair : 

 prosternum flat, without elevated lines; metasternum smooth, slightly punctate 

 at sides, mesocoxal arc short, joining the suture near the front angle. Abdomen 

 with six distinct segments, sparsely punctate, the metacoxal arc entire, nearly as 

 long as the segment. Length .03 — .04 inch. ; 1 mm. and less. 



This species resembles some of the smaller forms of )inni(s and 

 punctum, but may be knowai from these as well as any others in our 

 fauna by the nearly erect, sparse hairs of the surface. 



Hab. — Florida, Tampa, Bar|tow, Crescent City and Haulover 

 (coll. Hubbard and Schwarz). A specimen in bad condition in my 

 collection from Albucpierque, N. Mex., probably belongs here. This 

 Scymnus is predatory on Aleyrodes citri. 



S. punctatus Mels. — Oblong oval, more than half longer than wide, black, 

 shining, each elytron with a small, oval, red spot near the centre. Head sparsely 

 punctate. Thorax slightly narrower than the elytra, narrowed in front, sides 

 nearly straight, arcuate near front angles, disc distinctly j)unctate, the punctures 

 evenly disposed, basal marginal line distinct. Elytra a little wider at base than 



TRANS. AM. ENT. .SOO. XXII. MAY, 1895. 



