No. 34-] HEMIPTERA OF CONNECTICUT: PEDICULIDAE. 23 



Family ECHINOPHTHIRIDAE. 



Occurs on marine mammals only and the species that may 

 be considered as possibly coming within the range of this list 

 occurs on the seals. 



Antarctophthirus Enderlein. 



Antennae five-segmented, abdomen beset with fine scales. 

 A. trichechi (Boheman). 



Vetensk. Akad. Forhandl., 12, 577, 1865. 



Recorded from the walrus and of doubtful occurrence within 

 our territory except on animals under confinement. 



Echinophthirus Enderlein. 



Antennae four-segmented, body without scales. 

 E. phocae (Lucas). 



Mag. Zool., Ins., 121, 1842. 



This species has been reported from seals in the New York 

 Aquarium and may occur on straggling seals along the New 

 England coast. Its normal host is the common harbor seal Phoca. 



Suborder Homoptera. 



Key to Fa^-'ilics. 



1. Proboscis attached back of the head apparently between the fore 



legs 2 



Proboscis plainly attached to the head 5 



2. Tarsi two-jointed with two apical claws, wings when present four 



in number. Species capable of active movement 3 



Tarsi one-jointed with one apical claw. Males usually with one 

 pair of wings. Females wingless, often without legs and immov- 

 ably fixed to host plant COCCIDAE, p. 346 



3. Hind femora not enlarged. Fore wings similar in texture to 



rear wings 4 



Hind femora enlarged for jumping. Fore wings thickened 



PSYLLIDAE, p. 243 



4. Legs short, tarsal joints nearly equal in size. Wings usually 



opaque, whitish, or marked with spots or bands ; pupa stage 



present ALEYRODIDAE, p. 335 



Legs long and slender, basal joint of tarsi often short; wings 

 transparent, occasionally more or less colored. .APHIDIDAE, p. 250 



and CHERMESIDAE, p. 329 



5. Ocelli tw.0, rarely more ; front femora not enlarged ; species less 



than 25 mm. in length 6 



Ocelli three; front femora thickened and usually spined beneath. 



Comparatively large species over 25 mm. in length 



CICADIDAE, p. 238 



6. Antennae inserted in front of and between the eyes. Ocelli 



between the eyes, on the vertex or on the front 7 



Antennae inserted below the eyes, ocelli usually in cavities be- 

 neath or between the eyes FULGORIDAE. p. 24 



