No. 34.] HEMIPTERA OF CONNECTICUT I PEDICULIDAE. 19 



The body louse found mainly in the clothing is notorious as a 

 pest in prisons, barracks, armies and where sanitation is difficult; 

 particularly obnoxious as the carrier of typhus fever. 



New Haven, 1917. (J. S. Miller.) 



Phthirius Leach. 



Broad and crab-like in form with the front legs smaller than 

 the middle and hind pairs. 

 P. pubis (Linnaeus). Crab-louse of man. (PI. i, 8.) 



Syst. Nat., Edn. 10, 611, 1758. 



This is the common "crab-louse" occurring on the coarser hairs 

 and especially in the pubic region. 



New Haven, Feb., 1894, Nov., 1902 (H. A. Doty). Storrs (G. H. L.). 



Pedicinus Gervais. 



The species of this genus are easily recognized by the three- 

 jointed antennae. They have elongate bodies and occur on mon- 

 keys. While not native to this region there is of course frequent 

 opportunity for their appearance in connection with their hosts. 



Family HAEMATOPINIDAE. 



The species of this family occur on a variety of mammals living 

 on land but not on man or other primates. The eyes are very 

 small or wanting and the feet are often provided with special 

 structure for clasping the hairs. Most of the species are distinctly 

 flattened. 



Key to Genera. 



Antennae five segmented 2 



Antennae three segmented 13 



All legs of equal size Haematopinus, p. 20 



Front legs smaller than the others 3 



Front legs with two claws [Scipio] 



Front legs with one claw only 4 



Abdomen without pleural plates 5 



Abdomen with pleural plates 6 



Abdominal spiracles large tubular, projecting [Solenoptes] 



Abdominal spiracles small not projecting 7 



Tergum and sternum with more than one series of hairs 8 



Tergum and sternum with but one series of hairs 9 



Head usually slender Linognathus, p. 20 



Head usually broad Haemodipsus, p. 22 



Tergum and sternum with not more than two series of hairs 10 



Tergum and sternum with three series of hairs . .Hoplopleura, p. 21 



Middle and hind legs of equal size, larger than front pair 12 



Front and middle legs of equal size smaller than hind 



Enderleinellus, p. 22 



10. First antennal joint with a stout spine Neohaematopinus, p. 22 



First antennal joint without spine 11 



11. Abdominal tergum with chitinized plates Polyplax, p. 21 



Abdominal tergum without chitinized plates [Linognathoides] 



