38 Journal New York Entomological Society. |Voi. xvl 



Habitat. — Introduced from China and now established in Georgia and possibly 

 other southern states. 



The pernicious San Jose scale was accidentally introduced in Cali- 

 fornia and has since spread over our country faster than its native 

 natural enemies can keep it in check, to the great damage of our 

 peach and other fruit trees. In the hope of finding an effective 

 enemy that might also be introduced, the Department of Agriculture 

 sent an agent to China whence the San Jose scale was believed to have 

 come. There Chilocerus similis was found to be sufficiently numerous 

 to keep the scale in check. A number were brought alive to Washing- 

 ton and a large number were successfully bred in captivity and dis- 

 tributed to Georgia and New Jersey. In the latter state the winters 

 seem to have been too severe for this species ; but in Georgia it 

 appears to have become established and to have been of service in 

 keeping the scale from spreading. 



In the larval stage this species differs more from our native Chilo- 

 corus than in the imago. 



Chilocorus cacti Linn. 



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

 elytron ; beneath the sterna are in great part red, abdomen red. Pronotum slightly 

 pubescent at the sides, deeply impressed apically near the angles in the male, edge 

 there rufescent. Tibiae armed with a short spine. Claws strongly toothed at base. 



Length. — 5 mm. = .20 inch. 



Habitat. — Honduras, Cuba, Mexico, Texas, Porto Rico, Florida (Key West). 



Var. confusor Casey 



Smaller, narrower, pronotum not impressed in the male, edge not rufescent. 



Length. — 4.5. = .18 inch. 



Habitat. — Arizona, So. Cal. 



The specimens usually found in our collections represent this variety. 



Arawana, a new subgenus. 



This subgenus has for its type the species described by Casey as 

 Exochomus arizonicus. It has all the characters of the tribe Chilo- 

 corini and of the genus Exochomus but differs from the other species 

 of that genus by its form, which is subcom pressed, and by its front 

 tibaj, which are expanded in front into a thin plate, lamina or keel. 



Arawana arizonica Casey. 



Broadly oval, very convex, subcompressed ; black above, head and pronotum 

 slightly rufescent at apical margin, elytra each with an elongate oval red spot on the 

 median line, extending two fifths from base with its margin rather nubilous and with 

 nubilously red margin; beneath testaceous throughout; anterior tibiae dilated and 



