362 DactylopiincB. 



across the middle, tapering at both extremities, terminating posteriorly in a 

 a pair of stout conical lobes. Segments well defined with, in the living insect, 

 a well-marked ventro-lateral longitudinal sulca on each side. Antennas placed 

 closed together on the extreme anterior margin ; six-jointed {fig. 6), short and 

 stout, terminal joint longest, about as long as the previous three joints together; 

 each joint with several longish stout hairs, in addition to which there are four 

 conspicuous stout curved club-shaped spines, three of them being situated 

 on the terminal and one on the subterminal joint. Rostrum close to anterior 

 margin ; mentum biarticulate, basal joint shortest. Limbs fully developed, 

 comparatively small but stout ; femur and trochanter together approximately 

 equal in length to the tibia, tarsus and claw ; tibia and tarsus of equal length, 

 with a longish stout curved spine on the inner margin of each ; claw compara- 

 tively long and slender ; ungual digitules represented by a pair of short simple 

 hairs ; no tarsal digitules. Spiracles minute and inconspicuous. Caudal lobes 

 {fig. 7) broad, rather densely chitinous, the extremity of each bearing a very 

 large and stout bluntly pointed spine. Anal aperture surrounded by six stout 

 spiniform setae, the median pair longer and stouter than the others. Terminal 

 abdominal segments conspicuously hairy, especially on and at the base of the 

 caudal lobes where many of the hairs are whip-like in form. The hairs on the 

 rest of the body are smaller and less conspicuous. There is a pair of well- 

 defined oval cicatrices on the dorsum of the abdomen, situated apparently 

 at the junction of the penultimate and antepenultimate segments. The derm 

 bears numerous glandular pores of several forms. The simplest form {fig. 8) 

 is circular, with a chitinous rim and a nebulous inner ring. But the most 

 conspicuous dermal character is the presence of numerous large compound 

 spinnerets (yf^. -9), each of which contains three large circular pores bound 

 together by a subtriangular chitinous rim. On the median line of the venter 

 (situated apparently on the metathoracic and first two abdominal segments) 

 are three subcircular chitinous organs {fig. 10) analogous to (if not homo- 

 logous with) the cribriform plates of Cerococctis and Lecaniodiaspis. Total 

 length I to 2 mm. 



Nymphal female {fig. 14) elongate-ovate. Antenna {fig. 15) and limbs as 

 in the adult. Caudal lobes {fig. 16) proportionately more prominent, with the 

 terminal spine longer, more sharply pointed and falcate, the curve taking an 

 upward direction. Between the lobes, situated dorsally, is a pair of similar but 

 smaller falcate spines. Another pair of falcate spines is found on the dorsum 

 immediately behind the antennjE. Both compound and simple pores occur on 

 the derm, but the former {fig. 17) are much smaller than in the adult, and the 

 individual pores are ovate instead of circular. Three cribriform organs are 

 found on the venter ; of these, the anterior one (situate between the bases of 

 the third pair of legs) is less than half the size of the other two which are 

 placed respectively on the first and second abdominal segments. These 

 organs are more conspicuous and more highly developed in the nymph than in 

 the adult. They contain numerous irregularly polygonal cells (see fig. 18). 

 The dorsal abdominal cicatrices are contracted and inconspicuous. Length 

 175 to 2'25 mm. 



Young larva ifig. 11) elongate. Antenna {fig. 12) five-jointed, with four 

 club-shaped spines as in the nymph and adult insects. Caudal lobes scarcely 

 prominent, each bearing a conspicuous upwardly curved spine {fig. 15). 

 There are no falcate spines on the dorsum. Dorsal cicatrices well defined, 



