132 [August, 



montlcola (Muls. 115), but the elytra have the lateral margin from the humeri 

 to the middle broadly sulcate, while in C. monticola the same part is scarcely 

 perceptibly copcave ; the black transverse spois of the elytra are also larger. 

 Otherwise there is no special difference. 



Myzia Muls. 



This genus differs from Coccinella by its long and slender antennae ; I have 

 included in it also Mulsant's genus Anatis, as I can find no difference worthy 

 of note. The following is new : 



1. M. Rathvoni, late ovata, ntrinque fortius angustata, thorace lateribus 

 rectis, maculis duabus baseos lateribusque late albis, his puncto nigro notatis, 

 elytris piceo-rufis, lateribus usque ad medium explanatis. Long. -4. 



I take great pleasure in dedicating 'this fine species to Mr. S. S. Rathvon, of 

 Lancaster, Pa., to whom science is indebted for many valuable additions to our 

 entomological fauna. It was found at Sacramento, California, by Mr. Childs. 

 Broadly oval, very convex, strongly narrowed before and behind, so as to be al- 

 most angulated at the middle, on the sides. Head black, with an obscure rufous 

 spot each side. Thorax twice as wide as long, strongly narrowed in front, 

 sides nearly straight, broadly margined ; black, with two basal spots and a very 

 broad lateral margin white ; the sides have a marginal black spot near the pos- 

 terior angles. Elytra piceo-rufous, with some very indistinct black dots, of 

 which the posterior series consisting as in M. 15-punctata of 6 spots is most 

 distinct ; the lateral margin from the base to the point of greatest breadth is 

 strongly flattened and concave, and is blackish towards the middle. Beneath 

 black. 



This is evidently a very dark colored specimen, and it is probable that on 

 further exploration varieties will be found similar to the light colored and ocel- 

 late specimens of M. 15-punctata. 



COCCIDULA Kug. 



1. C. lepida, elongato-oblonga, flava, subtiliter albo-pubescente, capita 

 pectoreque nigris, elytris disperse punctatis, basi, lateribus ad medium, macula- 

 que communi pone medium nigerrimis. Long. 'll. 



One specimen, Vermont. Prof. C. B. Adams. Oblong elongate, convex, 

 bright yellow, covered with fine short white hair. Head black, finely and not 

 densely punctured, clypeus, mouth and antennae yellow. Thorax finely punc- 

 tured, rounded on the sides, base rounded, posterior angles subobtuse, not 

 rounded. Elytra tolerably coarsely punctured, base and sides as far as the 

 middle black ; black portion broader at the scutellum and at the middle of the side ; 

 disc with a common rounded black spot at the second third ; beneath yellow ; 

 breast entirely black ; prosternum black posteriorly. 



The anterior coxae in this genus are much smaller than in any other of the 

 present tribe, and are almost round. 



ExocHOMus Redt. 



1. E. G u e xi, hemisphericus, thorace nigro lateribus antice rufis, basi sub- 

 angulato immarginato, elytris obsolete punctulatis, rufis macula magna sub- 

 apicali nigra. Long. '12. 



Louisiana. 1 have dedicated this species to my estimable friend Mr. J. A. 

 Guex, to whom I owe my specimens of this and many other interesting species. 

 Size and form of E. marginipennis (Muls.) (E. prcetextatus Mels. Pr. Ac. 3, 178 ; 

 Cocc. marginipenyiis Lee. An. Lye. 1, 173.) Head black in the female, yellow 

 in the male. Thorax very obsoletely punctulate, black; sides broadly rufous 

 in the male, rufous only at the anterior angles in the female ; base very much 

 rounded, somewhat angulated, not margined. Elytra very finely and obsoletely 

 punctulate, rufous with a large black spot near the apex and a little nearer to 

 the suture than the side. Beneath piceous j sides and feet yellow. 



BiiAciiiACANTHA Chevr. 

 1. B. albifrons. Coccinella alhifrons Say, Journ. Ac. Nat. Sc 4, 94; 

 Muls. 1019. 



