32 [February, 



ALEUEODICUS, Doug., n. g."^ (PL i). 

 Aleurodictjs anojs^je, n. sp. 



Larva. Oval, depressed, ochreous. Longest diameter, 1*25 mm. Antennae 

 apparently only 2-jointed, the 2nd long and annulated. Legs short, stout, tarsus 

 with one claw only. Four lateral, infundibuliform, compound spinnerets on each 

 side, and posterior to these, two more simply constructed and smaller secreting 

 glands on each side, also one on each side anterior to the first pair of legs. Labium 

 one-jointed, prolonged. Labrum quadrilateral. Mandibular organs short, with the 

 maxillary setse long and fine (fig. 2). Anus large, with long framework of colon 

 easily distinguishable. 



S and ? adult. Length, 2'25 mm. Antennae long, 7-jointed ; basal joint 

 short ; 2nd, longer ; 3rd, very long ; 4th and 5th, sub-equal ; 6th and 7th, 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 developed. Scutellum, a pair of pyriform 

 plates. Wings white, ample, broad ; anterioi", incumbent, length, 3 mm. ; posterior, 

 length, 2 mm. (fig. 3) ; strong central nervure bifurcated near the apex ; branch 

 nervure proceeding from near the base of the central nervure. Grenital organs of 

 female bivalvular, and between the valves is situated the ovipositor (fig. 7). In the 

 male the valvular organs are modified in the form of a forceps, between which lies 

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



Habitat : Anona muricata and Micliardla pacijica, Demerara. 



Aleueodicus cocois. 

 Aleurodes cocois, Curt., Glard. Chron., 1846, p. 284 ; Signoret (Ann. de la 

 Soc. Ent. de France, 4 serie. Tome viii, p. 399 [1868] ). 



This having been described by Curtis, and translated into French 

 by Signoret {I. c), it is unnecessary to give a further description, but 

 I should mention that the only difference I see between it and Aleu- 

 rodicus anonce, described above, is in the smaller size and the more 

 diaphanous wings of the imago. This insect only measures 1'5 mm., 

 and the thorax is not so chitinous and well developed as that of the 

 A. anoncB, although the structure is the same. 



Hahitat : cocoa-nut palm only, Demerara. 



I have only to add that Mr. Mclntire kindly copied the descrip- 

 tion of A. cocois from Gard. Chron., and Mr. Douglas sent me 

 Signoret's observations, for I had neither of the works necessary at 

 my disposal. 



* Aleurodicus .-—Characters in general as in Aleurodes ; differs in having the median nervute 

 of all the wings strongly bifurcate at the apex, instead of being simple ; in the structure of the 

 male genitalia, and in the characteristics of the larva, as stated.— J. W. D. 



