(aleurodicus) aleyrodes asarumis. 45 



We have seen no example of this species. Material in the bureau 

 collection supposed to be anonce^ on careful scrutiny, does not fairly 

 conform to the original and rather indefinite description. So far 

 as we are aware anona? has not been rediscovered since it was de- 

 scribed. Following is the original description: 



Larva. Oval, depressed, ochreous. Longest diameter 1.25 mm. Antennro ai>- 

 parently ouly 2-joiuted, the second long and lateral, infundibuliform, compound 

 spinnerets on each side, and posterior to these, two more simply constructed 

 and smaller secret-glands on one side, also one on each side anterior to the first 

 pair of legs. Labium one-jointed, prolonged. Labrum quadrilateral. Mandi- 

 bular oi'gans short, with the maxillary setie long and tine (PI. I [X], fig. 2.) 

 Anus large, with long frameworli of colon easily distinguishable. 



3 and 9 adult. Length 2.25 mm. Antenme long, 7-jointed ; basal joint short; 

 second longer; third very long; fourth and fifth subequal; sixth and seventh 

 shorter. Legs long; the posterior pair considerably longer than the others. 

 Tarsus 2- jointed; in the posterior pair of legs the first joint of the tarsus is 

 the longest, in the others equal. Two claws. Tibia and tarsus pinnate. One 

 stout spine at junction of coxa with trochanter. Several small stout spines at 

 junction of tibia and tarsus. Head inserted. Mesonotum chitinous, well de- 

 veloped. Scutelluni, a pair of pyriform plates. Wings white, ample, broad; an- 

 terior incumbent, length o mm. ; posterior, length 2 mm. (PI. I [X], fig. 3) ; strong 

 central nervure bifurcated near the apex; branch nervure proceeding from 

 the base of the central nervure. Genital organs of female bivalvular, and be- 

 tween the halves is situated the ovipositor (PI. I [X], fig. 7). In the male the 

 valvular oi'gans are modified in the form of forceps, between which lies the 

 penis (PI. X. fig. 4). On the last segment of both sexes are two external 

 processes. 



Habitat; Anona miiricata and Richardia pacified, Demerara. 



(Aleurodicus) Aleyrodes asarumis Shimer. 



Aleyrodes asarumis Shimer, Trans. Amer. Ent. Soc, vol. 1, p. 281 (1867). 

 Aleurodicus asarumis Riley and Howard, Insect Life, vol. 5. p. 219 (1893). 

 Aleyrodes actece Britton. Ent. News, vol. 10, p. G5, pi. 4 (1905). 



This species was described as an xUeyrodes by Dr. Shimer. It 

 was later transferred to Aleurodicus by Riley and Howard in Insect 

 Life, Volume V, page 219, apparently w^ithout an examination of the 

 form, and this placing has been followed by all subsequent writers. 

 In Canada it occurs in large numbers on the underside of the leaves 

 of the wild ginger and the cohosh, the plants from which Shimer 

 described it. An examination of specimens, both of pupa and adults, 

 collected by Prof. T. D. Jarvis, show the species to be an Aleyrodes 

 and not an Aleurodicus. This we would expect, for all known forms 

 of the genus Alcurodictis inhabit the warmer regions. Following 

 Riley and Howard, Dr. Britton considered Shimer's species an 

 Aleurodicus and redescribed and figured the form from the same 

 plant under the name of Aleyrodes acteoB^ in Entomological News, 

 March 1905. His excellent description and figures can now be trans- 

 ferred to Shimer's species and finally settle the standing of asarumis. 



