4 THE CANADIAN ENTOMOLOGIST. 



second. Mentum club-shaped, thickest at distal part of second joint, 

 tipped with black. Rostrum short, conical, bearing three long set.ne. 



Eyes oblong, constricted somewhat above the centre, giving some- 

 what of a "dumb-bell" shape. Dorsal tubercle (operculum) when 

 elevated and seen in lateral aspect, conical ; lingula long, tapering, 

 covered with minute hairs. Operculum, when net elevated, and seen in 

 dorsal aspect, strongly convex, bearing a row of minute hairs on caudal 

 margin ; lingula protruded, reaching considerably beyond operculum. 

 Genitalia acutely conical. Margin of wings delicately beaded all around; 

 beads setate. At base of second pair, on cephalic margin, are seven to 

 nine setse, four of which are usually paired. Median vein of first pair of 

 wings unbranched, extending almost to distal end of wing ; nearer 

 cephalic than caudal margin proximad, but curving gradually caudad in 

 distal half, dividing this part approximately in the middle. A short 

 veinlet arises from base, apparently distinct from median, and extends 

 obliquely to caudal margin of wing. 



Length about .58 mm.; proportionately smaller than female. Geni- 

 talia forcipate ; penis about three-fourths the length of valves ; curved, 

 suddenly enlarged at base. In other respects essentially as in female. 



This Aleurodid occurs in great abundance on the under surface of 

 the leaves of mulberry (Morns) at Tampa, Florida. Figure i, from photo- 

 graph, enlarged about two-thirds diameter, will serve to illustrate this. 

 The insect occurs in some abundance at Lake City, on the leaves of 

 various trees, as Telea Americana, Callicarpa Americana, Liquidamber 

 stracijlua, Hex opaca, and less frequently on Persea Carolina. 



Under date of April 26th, 1898, Prof. Cockerell sent me specimens 

 of what are doubtless this insect, on a creeper from Kingston, Jamaica. 



ODOUR OF SAN JOSE SCALE, ASPIDIOTUS PERNICIOSUS. 



BV F. M. WEBSTER, WOOSTER, OHIO. 



In the many accounts of this insect, I do not recall that attention has 

 been called to the odour that is associated with this insect, and which, in 

 cases of excessive abundance, can be detected at a considerable distance 

 away. Where the air is quiet it is ot'ten possible to detect the presence of 

 a badly infested tree a yard away, and I presume that with more acute 

 olfactories, such as insects are supposed by many to possess, even the 

 presence of a more limited number of the scale might be detected at a 

 much greater distance. As ants do not appear to be at all partial to this 

 Coccid, at least in this country, it is not easy to understand what influence 

 this odour can have in the economy of the species. It is possible that, in 

 its native home, this odour might attract other insects and thus afford a 

 means of diffusion, not at present so available to the scale in this country. 



