506 



FAMILY XVI. — COCCINELLIDJE. 



KEY TO INDIANA SPECIES OF ORTHOPERUS. 



a. Elytra not punctate, but marked with small V-shaped scratches; length 



•~ mm - SCUTELLARIS. 



aa, Elytra distinctly but finely and sparsely punctate; length not over 

 .6 mm. 



b. Form oblong-oval ; length .6 mm. 970. glaber, 



bl). Form evenly oval, the sides more curved; length .5 mm. 



971. MICROS. 



0. scutellaris lee, black, legs and antennae paler, is known from 

 Ohio and northern Illinois. 



970 (3029). Orthoperus glaber Lee, Proc. Phil. Acad. Nat. Sci„ VI, 1852, 



142. 



Oblong-oval. Picepus-black, glabrous, shining. Thorax twice as wide 

 as long, narrowed in front, emarginate at apex, hind angles rectangular. 

 Elytra very sparsely and obsoletely punctured. Length .6 mm. 



Southern two-thirds of State ^.frequent. March 20-November 8. 

 Taken by sifting. 



971 (— — )• Orthoperus micros Casey. Journ. X. T. Ent. Soc. VIII, 3900. 66. 

 Rounded-oval. Piceous-black, glabrous, shining. Reticulations of sur- 

 face distinct beneath the lens. Eyes separated on the front by but little 

 more than twice their own width. Length .5 mm. 



Throughout the State ; scarce. May 19- July 4. 



Family XVI. COCCINELLID.E. 



The Lady Bugs. The Plant-louse Beetles. 



This family comprises a moderate number of rounded or hemi- 

 spherical, rarely oblong, convex beetles, the larger members of 

 which are well known under the common name first mentioned. In 

 color they are generally red or yellow, with black spots, or black 

 with white, red or yellow spots. The name Coceinella is derived 

 from the Coccus, which produces the cochineal dyes so extensively 

 used before the aniline dyes were discovered, and 

 was suggested by the prevalence of red in the 

 coloration ot many of these insects. In most 

 eases the surface is glabrous, but in some of the 

 smaller forms it is plainly pubescent. 



The most distinctive characters of the family 

 are the three- jointed tarsi and the broad, hatchet- 

 shaped terminal joint of the maxillarv palpi. 



Fig. 182. Coceinella. 1, An- . • ^ - . \ _. . , , 



tenna; 2, maxillary palpus; 3, ( h ig. ibz.) In addition they have the antenna 3 



tarsus. (After Westwood.) . 



11-jomted, terminating in a more or less distinct 

 3-jointed club and inserted at the inner front margin of the eyes; 

 head deeply immersed in the thorax, which is transverse, rather 



