134 



APPLIED ENTOMOLOGY 



injurious household pest on this account. This species feeds mainly on 

 plant lice, but to some extent also on the pear psylla. Another species of 

 about the same size is known as the Twice-stabbed Lady beetle (Chilo- 

 corus bivulnerus Muls.)- Here the head and pronotum are black, as are 

 also the elytra, except for a red spot in the center of each, thus just 

 reversing the elytral color pattern of the last described species. It feeds 

 on scale insects and also on plant lice and the Colorado Potato Beetle. 



Fig. 125. — Examples of Lady Beetles: a, Twice-stabbed Lady Beetle (Chilocorus 

 bivulnerus Muls.) : b, Two-spotted Lady Beetle {Adalia bipunctata L.) ; c, Nine-spotted 

 LadyBeetle (Coccinella novem.notata Hbst.) : d, Spotted Lady Beetle {Coleomegilla fuscilahris 

 Mu)s.): all about twice natural size. {From Conn. Agr. Exp. Sta. Bull. 181.) 



Other common species are the Nine-spotted Lady beetle {Coccinella 9-notata 

 Herbst.) with nine black spots on its red elytra; the Fifteen-spotted Lady beetle 

 {Anatis 15-punctata Oliv.), the largest species in the Northeastern States, which 

 has 15 black spots on its red elytra; the Pitiful Lady beetle {Pentilia misella Lee), 

 a very tiny black species which feeds on scale insects and aphids, and the Spotted 

 Ijady beetle {Coleomegilla fuscilahris Muls.) about a fifth of an inch long, usually 

 bright pink with black spots and with its body rather oval in outUne, somewhat 

 pointed behind. This species feeds on many kinds of plant hce and other small 

 insects and tends to hibernate in' clusters, often several hundred together, under 

 leaves at the bases of treetrunks. 



b d a 



Fig. 126. — Different stages of the Nine-spotted Lady Beetle: 

 d, eggs. All much enlarged. (Modified from Palmer, Ann. 



a, adult; b, larva; c, pupa; 

 Eni. Soc. Am., vii, 1914.) 



The Convergent Lady beetle {Hippodamia convergens Guer.) is about 

 a quarter of an inch long, with two converging yellow marks on the 

 pronotum and six black spots on each elytron. This widely distributed 

 species has been found feeding on a number of kinds of plant lice and in 

 addition, on asparagus beetle larvae, eggs of the Colorado Potato beetle 

 and of the Grape-root worm, red spiders, the Bean Thrips, Alfalfa Weevil 

 and Chinch Bug. On the Pacific Coast it gathers in enormous numbers 



