68- Transactions. — Zoology. 



Genus Chionaspis. 

 Chionaspis brasiliensis, Siguoret. 



In reporting last year this insect from India, I stated that 

 the adult female was "brown." Mr. E. E. Green informs me 

 that in life the colour is rather " yellow, deepening in older 

 specimens to orange ; in some individuals suffused with 

 purplish-brown." He also considers the live male as red in 

 colour, but two of the specimens I had before me were alive, 

 and w^ere certainly, to my eye, yellow, as I stated in my paper. 



Colour is a very fallacious test, as I have before several 

 times remarked. 



Genus Mytilaspis. 

 Mytilaspis formosa, sp. nov. Plate III., figs. 4-6. 



Female puparia congregated in groups and patches on the 

 leaf with much white cottony fluff: the surface of the food-plant 

 is very pale straw-colour, and the groups of puparia appear also 

 yellowish, as the yellow pellicles show through the cotton. 

 The puparia are, as a general rule, irregularly placed, but it 

 is by no means uncommon to find them arranged radially, 

 that is, with a common centre, towards which the larval 

 pellicles point, and from which the fibrous portions spread out 

 like a fan, A group so arranged, with the golden pellicles 

 appearing through the white cotton, is very elegant. Length 

 of the puparium averaging jVn. The form is elongated, 

 usually straight, slightly dilated tow^ards the end. 



Male puparia congregated in the same groups with the 

 females, and of similar colour ; distinguishable mainly by the 

 presence of only one pellicle. Form Hattish, cylindrical, not 

 carinated ; length about ^jin. 



Adult female dark-orange or golden-brown ; elongated as 

 usual in the genus; length about ^in., but shrivelling at 

 gestation. Abdomen ending in a circular curve, much broken 

 by small denticulate projections. There are two median 

 sub-cylindrical lobes with rounded terminations, and with the 

 margins very minutely serrulate ; these lobes are not adjacent, 

 and between them are two short fine spiny hairs : on each 

 side, separated by a short distance, is another smaller lobe. 

 The posterior segments of the abdomen bear a few spines. 

 Pygidium bearing five groups of sjpinnerets ; upper group with 

 five orifices, upper laterals 14 to 18, lower laterals 20 to 24. 

 There are many larger single orifices ; and near the extremity, 

 above the lobes and on the dorsal surface, are eight pairs of 

 compound spinnerets, from which spring cylindrical hyaline 

 tubes, extending beyond the margin. These tubes are not 

 serrated at the extremity, and do not resemble the " plates " 

 of Parlatoria, but rather the long hyaline tubes of the Acau- 

 thococcids. 



