THE CANADIAN ENTOMOLOGIST. 287 



tremely probable that the undescribed Dactylophis mentioned in Insect 

 Life, iii., pp. 413, 419, as infesting the roots of tomato in New 

 Mexico is the same. Another undescribed Dactylopms infests the 

 roots of Solarium melongena in Jamaica, and aUhough it certainly 

 resembles D. solani, its identity with it cannot be affirmed until adult 

 specimens have been examined. (Entom., 1893, p. 266.) 



D. solani is rather an unsatisfactory species to describe, as it possesses 

 just the necessary characters of the genus, neither more nor less. It is 

 thus much like D. simplex, Ckll., which lives on leaves of Pancratium in 

 Jamaica, but the similarity need not cause confusion, owing to the great 

 difference of habitat. D. affinis, Maskell, which lives on potato-tubers in 

 Australia, resembles D. solani considerably, but differs in the lateral 

 filaments and in the proportions of the joints of the antennse. 



D. lavandulce, Signoret, found on roots of Lavandula in Europe, 

 differs in the proportions of the antennal joints ; and D. arecce, Mask., on 

 roots of Areca in New Zealand, will at once be distinguished by the very 

 short second joint of the antennsB. D. poce, Mask., on roots of Poa in 

 New Zealand, is quite different from D. solani. 



At Las Cruces one finds on Compositse an insect very similar indeed 

 to D. solani, which I have described as Phenacoccus helianthi. It is dis- 

 tinguished without much trouble by the antennae, which have 9 joints in- 

 stead of 8, and by its above-ground habitat. As one contemplates these 

 two insects, it is difficult not to think that we have in D. solani a repre- 

 sentative of the old stock-form from which Phenacoccus helianthi sprung. 



(17.) Diaspis lanatus^ Morg. and Ckll. — This injurious species has, 

 up to the present time, been recognized only in the West Indies and 

 some of the eastern United States. I have now to report it from the 

 other side of the world, namely, Ceylon. Mr. E. E. Green, of Punduloya, 

 Ceylon, lately sent me specimens of what he considered a new species of 

 Diaspis, " fatally abundant on cultivated geranium plants," and I can 

 make nothing of it but D. lanatus. It similarly infests geraniums 

 (pelargoniums) in Jamaica. 



(18.) Aspidiotus convexus, Comstock, 1881. — This so-called species, 

 which has been reported from California (Comstock) and New Mexico 

 (Townsend), appears to have no real existence in the form described by 

 its author. The New Mexican form, found on ash in Las Cruces, turns 

 out to be A. juglans-regicE var. albus, Ckll. I sent specimens of this to 



