Mytilaspis. 83 



MYTILASPIS GLOVERII, Packard. 



(Plate XXII.) 



Coccus gloverii (Packard). Guide to the Study of Insects (1869), P- 5-7 

 Aspidiotus glovet'it {V:icka.r(\). Ibid., 2nd edition (1870), p. 527. 

 Mytilaspis gloverii {VSicVaxd). Ashmead, Orange Insects (1880), p. i. 



Female puparium {figs. 2 and 3) very long and narrow, straight or curved, 

 sides almost parallel, with a well-defined narrow flattened border. Colour 

 variable, brownish-yellow, reddish, or dark redidish-brown, with pale margin ; 

 the paler specimens usually occurring on the under surface of the leaf. Pellicles 

 yellow, occupying a little more than one-third of the total length of the scale ; 

 the second pellicle elongate {fig. 7), with lateral margins of abdominal segments 

 rounded. Ventral scale whitish, well developed, with a median longitudinal 

 division {fig. 3) attached a little within the margin. Total length of scale 

 2'5o to 3 mm. ; breadth 0*59 mm. 



Male puparium {figs. 4 and 5) much smaller and more delicate, long and 

 narrow. Colour pale yellowish-brown, with whitish flattened margin. Pellicle 

 yellow, occupying about one-third the total length. There is the usual hinge- 

 like structure towards the posterior extremity. Ventral scale incomplete, a 

 narrow white strip on each side, attached within the margin. Length r5o mm. ; 

 breadth 0*50 mm. 



Adult female {fig. 2) elongate, lateral margins straight and approximately 

 parallel, the abdominal area being only slightly wider than the anterior parts. 

 The meso- and meta-thorax are confluent without any definite line of division, 

 which is, however, indicated by the position of the stigmata. Abdominal 

 segments very short, with lateral margins not much produced ; the last three 

 each with two (sometimes three) stout spine-like processes, and numerous 

 minute tubular spinnerets opening on the dorsal surface along the margins 

 and segmental sutures. A very small group (two or three orifices only) of 

 glands in front of the anterior stigmatic openings. After gestation the cuticle 

 of the thoracic parts becomes rather firm and chitinous, and is minutely ribbed 

 transversely. Colour pale purple ; extremity of abdomen reddish. Pygidium 

 {fig. 8) broad : extremity more truncate and sides more acutely sloped than 

 in citricola. Mesal lobes obscurely tricuspid, not conspicuously crenulate, 

 smaller than in citricola j second lobes duplex ; other lobes obsolete. There 

 are nine pairs of simple tapering squames placed as in citricola, but rather 

 longer and stouter. Circumgenital glands in four groups : in my Ceylon 

 examples I find three or four orifices in the median group, six or seven in 

 the upper laterals, and four to six in the lower laterals. Margin with twelve 

 large oval pores in connexion with rather conspicuous tubular ducts. Four 

 series of small capitate ducts opening by large pores on to the dorsal surface. 



