68 PRINCIPAL CACTUS INSECTS OF UNITED STATES. 



Page. 



.; f, morata, an injurious cactus insect 34, 41 



bibliographic reference 55 



distribution 34 



inornata, an injurious cactus insect :V4. 41 



pallid g cactus insect 32-33, 41 



bibliographic reference 55 



descripl ive 39 



egg, descriptive 39 



nymphal stages, descriptive 3a 



snowi, an injurious cactus insert 34, 41 



Nausigaster unirnaculata, scavenger in cactus 48 



Neoponeru villosa incidentally associated with cactus 52 



Neriusflavijrons, scavenger in cactus. 49 



Nodonota tristis frequenting flowers of cactus -49 



Noserus emarginatus incidentally associated with cactus 51 



Notogramma stigma incidentally associated with cactus 53 



Nysiu8 angu8tatu8 =Nysius erica*. 51 



incidentally associated with cactus 54 



Odontomachus clarus (?) incidentally associated with cactus 52 



Qdynerus clusinus incidentally associated with cactus 53 



Oligota sp., scavenger in cactus 47 



Omalium cacti, scavenger in cactus 47 



Oncerometopus nigriclavus in list of injurious cactus insects 40 



Onychobaris mystica in list of injurious cactus insects 44 



Opuntia (see also Cactus). 



insects injurious thereto, in order of importance 13 



Opuntia arborescens, Camponotus maculatus vicinus var. nitidiventris thereon. . . 53 



flowers frequented by Diadasia austral is 50 



rinconis 50 



IAthurgus apical is opuntia 50 



food plant of Diaspis cacti 42 



echinocacti cacti 42 



opunti;r 42 



Disonycha varicorn is 22 



Lan/us succinctus 40 



Myrmecocystus melliger taken there* >n 53 



probable food plant of Mi litaraft rnaldialis 29 



arbuscula. food plant i »f ( 'helin idea sp 20 



banburjana, food plant of Cecidomyia opuntix 45 



bernardina, bibliographic reference 54 



food plant of Coenopccus palmeri 43 



cycloides, food plant of Pseudococcus sp 42 



elonpata, food plant of Diaspis echinocacti opuntia 42 



engelmanni, bibliographic references 54, 55, 56 



flowers frequented by Diadasia australis rinconis 50 



Megachili sidalcea 50 



food plant of aphis : >3 



Copestylum marginatum 47 



Diaspis cacti 42 



echinocacti cacti 42 



Gt bilis 43 



Hyporhagus U tonus found therein 48 



probable food plan lara/ernaldialis 29 



