Mar., 1908.] LENG : NOTES ON COCCINELLIIM . 37 



Chilocorus tumidus, new species. 



Broadly oval, very convex, shining black above with an ill-defined red spot in 

 front of the middle of each elytron ; below the abdomen, mouth parts and part of the 

 sterna are red, all other parts black. There are a few hairs at the sides of the pro- 

 notum and more on the head, otherwise the entire upper surface is glabrous. The 

 head is closely and conspicuously punctate, the pronotum and elytra bear shallow 

 distant punctures between which the surface is microscopically punctulate. 

 elytron is tumid or swollen in the subhumeral region, rather more conspicuously than 

 in other species of the genus. The eyes are entirely surrounded in front by the 

 epistoma ; the anterior tibiae are strongly dentate ; the claws are strongly toothed la 

 base, short and stout ; the tarsi entirely present a stouter appearance than usual. 



Length. — 5.5 mm. — .22 inch. 



Habitat. — Fortress Monroe, Va., April 19. 



Described from two specimens in the National Museum. 



A specimen in the collection of Professor Fall, Pasadena, Cal., 

 labelled Va., appears to be the same. Professor Fall's specimen is 

 piceous instead of black and the red spot is larger and more distinctly 

 outlined. 



Chilocorus bivulnerus Muls. 



Broadly oval, very convex, shining black above, with a rounded red spot on 

 each elytron in front of the middle and sharply defined ; abdomen red beneath, sterna 

 black; sides of pronotum slightly pubescent, head pubescent, upper surface otherwise 

 glabrous ; punctuation close and deep over the whole upper surface. The eyes 

 epistoma, claws, anterior tibia; and ventral segments are as described in the preced- 

 ing species. 



Length. — 3.7 to 5 mm. = .15 to .20 inch. 



Habitat. — Entire U. S. except southern California, extending into Manitoba 

 and Vancouve r . 



Var. orbus Casey. 



Black, with bluish reflection ; elytral spot larger, transversely oval. Replaces 

 bivulnerus in southern California. Casey has retained the name fratemus Lee fir the 

 specimens from northern California, Oregon and Washington but the characters given 

 are not constant and this name can only be regarded as a synonym. 



Chilocorus bivulnerus is the most widely distributed and best known 

 member of the tribe Chilocorini and wherever found is reported as 

 feeding on scale insects. Mr. Edgar L. Dickerson, assistant to the 

 State Entomologist of New Jersey, has described the abundance of 

 these beetles on maples attacked by the soft cottony scale. 

 Chilocorus similis Rossi. 



To be distinguished without difficulty from bivulnerus by the smaller size, elytral 

 spot at the middle instead of in front of the middle, surface more shining, punctua- 

 tion more shallow and distant. 



Length. — 3.9 to 4.8 mm. = . 15 to .19 inch. 



