REPORT OF THE ENTOMOLOGIST. 



45 



0.01 in length, soft-bodied, blackish in color, and coated over with a mealy 

 powder. This insect was once erroneously sup- No. 54. 



posed to be the preparatory state of the Aspi- 

 diotus pinifoU(s before mentioned. 

 Aleurodes (?) is a minute lour-winged insect, 

 No. 55. one-sixteenth of an inch 



in length , of a dull white 

 color, and is sometimes 

 found on the apple and 

 crab. Aleurodes vapo- 

 rarium, mentioned by 

 Dr. Packard in the Mas- 

 sachusetts agricultural report for 1870, is 0.01 in 

 length, yellowish- white in color, with snow-white wings. It infests green- 

 houses, and was found also out of doors on tomato-leaves, and is not 

 uncommon at the Agricultural College of Massachusetts on strawberry- 

 plants. The figure is taken from Westwood. A species of Aleurodes 

 has been taken on Cornus. 



J)ortliesia{f) cafapliracta, sl European species figured in Westwood. 

 The males only are provided with wings. The antennae are No- 56. 

 long, and nine-jointed, and the abdomen is ovoid, ending in 

 a bushy mass of threads. The female is covered with elon- 

 gated flakes of a waxy secretion, which, in some species are 

 nearly an inch long. The male insect is terminated by a 

 thick pencil of delicate white set®. Dr. Fitch mentions a 

 species, DortJiesia celastri, which is found on the celastrus. 

 The Pediculidce, or lice, are said by Professor Yerrillto be low, degraded 

 Eemiptera, destitute of wings, &c. Dr. Packard places them likewise 

 in the Memiptera. Leunis places them after Coccusm the Romoptera, and 

 therefore we have placed them provisionally at the end of the Komoptera 

 until a better place is found for them. They are blood- suckers, and live 

 on mankind and animals, and on mankind certain species attack only 

 certain parts of the body. The figure is magnified. 



Fediculus (Iiumanus) capitis, or the human head-louse, is always found 

 on the head among the hair. The males are smaller than No. 57. 

 the females ; the latter lay about 50 eggs, which adhere to 

 the hair. These insects, after 11 days, are said to be able to 

 propagate their species. They do not attack the smooth and 

 hairless parts of the body, but generally confine themselves 

 to the human head. Another species, Fediculus vestamcnti, 

 the clothes or body louse, confines itself to the smoother, 

 hairless parts of the body, and hide themselves in dirty gar- 

 ments. They deposit their eggs near the body, in the clothes 

 and in the creases of the linen. There is a third species of 

 louse, Fediculus pubis, the crab-louse, or gray-back, which is a much 

 broader square form than the other two species, that has 

 been a great scourge to soldiers in time of war. This in- 

 sect has been named the crab-louse from its broad crab- 

 like appearance. It is of a grayish color ; the head is small, 

 and appears to be united with the broad body Avithout any 

 thorax ; it inhabits the hairy part of the body, under the 

 arms or shoulders, in the beard, &c., but appears to avoid 

 the head. These insects pierce deeply into the skin of 

 mankind, and produce an intolerable itching. Mercurial 

 ointment was formerly used to eradicate these pests, but 

 if not rubbed off, or even washed off, as soon as it has 

 effected its -ourpose, or, if the patient is exposed to the cold and wet, or 



