10 
wherever found, and some of these may prove of importance for intro- 
duction, i. e., certain enemies of scale insects. 
My thanks are due to Mr. Charles E. Hale, American vice-consul at 
Guaymas; Hon. John Maguire, American consul at Tampico; Senor 
U. Ferreira, of Hermosillo, a well-informed man on scale insects of the 
orange; and to many others for favors shown and assistance given. 
All of the material outside of the Coccidse was determined by the 
Department in Washington—the Eneyrtine and Aphelininee by Mr, 
Howard, the Coleoptera by Mr. Schwarz, and the few Diptera by Mr. 
Coquillett. The plants were determined by Mr. Coville. My thanks 
are due to these gentlemen, and also to Prof. T. D. A. Cockerell, of Las 
Cruces, N. Mex., who at first looked over the coccids superficially and 
furnished me comments and notes upon them. They were then worked 
over by Mr. Pergande, who determined the most of the described 
species. The new species were afterwards described and named by 
Professor Cockerell, and appear in a paper at the end of this report. 
I should also mention that a considerable part of the list of Mexican 
Coceide was made from data furnished me by Mr. Cockerell. 
SCALE INSECTS (COCCID A). 
The seale insects form the major portion of the material secured, and 
will be treated first under the head of each species. Following this 
will be given a list of species found on each plant infested. 
1. Icerya purchasi Mask.—This species was found only on citrus fruits, principally 
orange, at Guaymas, Hermosillo, and Magdalena in the State of Sonora; at Victoria 
in Tamaulipas, and at Monterey in Nuevo Leon. 
In Guaymas it was found very bad on about six orange trees at Aranjuez, at a place 
formerly known as San Jose de Guaymas. On trunk, twigs, and leaves, September 23. 
Senor U. Ferreira informed me that the Icerya has been seen on grapes at Hermo- 
sillo; and further, that no other scale has ever occurred on orange in Hermosillo 
except the Icerya. The same gentleman informed me also that when the Icerya on 
the orange was shown to the native Mexicans, they replied that they had previously 
observed the same on the mesquite, but the latter was probably a different species, 
At Hermosillo it was found in the plaza on orange, and very sparingly in the orange 
orchards of that vicinity. At Magdalena it was found in great abundance on some 
orange trees in the patio of a hotel and in the plaza, and on one lime tree in the same 
place. At Victoria it was found in large numbers on orange; October 16 on leaves 
along midrib on underside. At Monterey it occurred on orange trees in one of the 
plazas. 
This species is found elsewhere in California, Florida, Australia, New Zealand, 
South Africa, and the Sandwich Islands. 
2. Orthezia sonorensis Ckll. n. sp.—Found numerously near San Ignacio, Sonora, 
September 26, on plant called ‘‘gecota,” Hymenoclea monogyra. This is a large spe- 
cies of Orthezia, larger than any hitherto known. 
3. Orthezia insignis Dougl., var.—Found abundantly on many orange trees in Gua- 
dalajara, October 9 and 10, in different parts of the city. In Aguas Calientes it was 
extremely abundant on a small lime tree October 11, covering the whole tree. A 
single specimen was also found on tomato. 
The true insignis is found out of doors only in Jamaica, Trinidad, and Demerara. 
It oceurs in hothouses in Europe and America. <A variety, probably the same, was 
found in Vera Cruz by Cockerell. 
