ART. i:i. MASKELL GENERA OF COCCTDAE MORRISON. 47 



nally proposed without description by von Ihering) will fit them 

 more correctly than any other described genus. The larvae of 

 Maskell's three species can easily be separated, as those of both 

 lectulaHus and hlrtus have conical marginal spines, instead of the 

 swollen ones found in eucalypti^ while the lectularius larva is even 

 broader oval than eucalypti, and that of hirtus is much more slender, 

 and tapers strongly behind, and as compared with lectularius, bears 

 numerous body setae. The adults may also be readily differentiated, 

 that of lectulaHus having a closely set continuous marginal row of 

 long conical, slender tipped, and rather delicate spines, while, as 

 stated, eucalypti has short, stout conical spines, alternating with 

 slender setae, and hirtus has undifferentiated marginal spines, and 

 the whole dorsum with numerous but scattered slender, long, and 

 rather delicate spines. The differences in /virtue, both in larva and 

 adult, are such that it may prove desirable to remove it to a distinct 

 genus after it has been studied more thoroughly. 



An effort has been made to cover the three Maskell species in the 

 following generic diagnosis : 



GENERIC DIAGNOSIS OF LACHNODFUS. 



" Dactylopiine " coccids, occurring free or protected by the bark 

 of the host, naked or more or less covered by secretion ; adult female 

 circular, flattened, antennae normally 7-segmented, tending to be 

 long and slender, the terminal segment smallest, legs rather stout, 

 the tibia much longer than the tarsus; mentum 1-segmented; dorsal 

 ostioles wanting, derm with two types of pores, quinquelocular disk 

 and large tubular opening into chitinized ring (based on eucalypti 

 only) ; derm with spines and slender setae more or less definitely 

 arranged along the margin and dorsally, anal lobes wanting, no anal 

 cleft, no cerarii, anal ring dorsal, some distance from margin, circu- 

 lar, complete, bearing numerous (about 20) setae of varying lengths, 

 each of these with a circle of pores aromid its base; intermediate 

 stages of female not laiown; larva elongate to very broad oval, 

 margin with an almost continuous series of stout spines, lanceolate 

 or conical, with a single pair of apical setae, antemiae 6-segmented, 

 the apical largest; legs noiTnal, mentum 1-segmented, no dorsal 

 ostioles, anal lobes not developed, derm pores wanting, body setae, 

 except marginal, small, slender, more or less numerous, anal ring 

 with six setae. 



The writers are unfortunately able to offer no definite suggestions 

 as to the proper position of this genus within the " subfamily " 

 Dactylopiinae. Its possible connection with Sphaerococcopsis has 

 already been indicated in the specific description. It does seem 



