No. 34.] HEMIPTERA OF CONNECTICUT: COCCIDAE. 347 



Herrick, G. W. Some Scale Insects of Mississippi. Technical Bulletin No. 



2, Miss. Agr. Expt. Sta., Agricultural College, Miss., 1911. 

 MacGillivray, A. D. The Coccidae. Scarab Company, Urbana, 111., 1921. 

 Newstead, R. A Monograph of the British Coccidae. 2 Vols., Ray Society, 



London, 1900. 

 Sanders, J. G. Coccidae of Ohio, I. Ohio State University Bulletin, Series 



8, No. 17, 1904. 

 Identity and Synonymy of Some of our Soft Scale Insects. 



Jour. Econ. Ent, Vol. 2, p. 428, 1909. 



The Coccidae are strongly parasitized by minute four-winged 

 chalcidid flies, and are preyed upon by larvae and adult lady-beetles 

 (family Coccinellidae). These two families of insects are 

 important agents in holding the Coccidae in check. 



In preparing this paper the author has used freely, and he wishes 

 to give credit for, the descriptive matter, keys and references in 

 the works on classification mentioned above. 



The author also wishes to thank Mr. Harold Morrison of the 

 Bureau of Entomology, Washington, D. C, and Professor J. G. 

 Sanders, Director of the Bureau of Plant Industry, Harrisburg, 

 Pa., who have given this manuscript a critical examination and 

 have suggested a number of changes which have been adopted. 



The terms used in classification are explained in the accom- 

 panying diagrams, Figs. 33"35- 



Key to Subfamilies. 



1. Females without abdominal spiracles ; males with simple eyes 2 



Females with abdominal spiracles ; males with compound eyes ; 



adult female active, with wax secretion in form of white lamellae 



Ortheziinae, p. 347 



2. Adult female without separate scale or armor; usually with legs 



and without pygidium 3 



Adult female covered by a separate scale or armor ; without legs ; 

 abdomen terminating in a compound segment or pygidium; anal 

 orifice without hairs Diaspinae, p. 360 



3. Adult female with deep cleft at posterior extremity; anal orifice 



closed above by a pair of triangular plates Coccinae, p. 354 



Triangular plates absent Dactylopiinae, p. 348 



Subfamily Ortheziinae. 

 Only one genus of this subfamily occurs in our region. 



Orthezia Bosc d'Antic. 



Head, thorax and abdomen distinct ; antennae with eight or nine 

 segments in male, and nine or ten in female ; eyes simple ; tarsi 

 each with one claw, without digitules. Male with pair of diaphan- 

 ous wings, with one furcate vein, and two long slender white 

 filaments projecting from near the posterior end of the abdomen. 

 Female with body more or less covered with wax secretion 

 arranged in symmetrical plates, and the eggs are carried until they 

 hatch in an ovisac which projects behind the body. 



