THE JUMPING PLANT-LICE OR PSYLLID^ OP THE NEW WORLD. 97 



conspicuous on the leaves, of a large size, greenish in color wdth a 

 bluish plume, and when fully mature open along the side in the form 

 of a large, curved lip." They are half an inch or more in length. 



Ashmead was unable to find the eggs on the leaves and concluded 

 that they were deposited beneath the surface within the tissue. 



Nymphs are abundant in the galls in various stages of growth and 

 surrounded by a milky fluid which usually almost fills the galls. 

 Tliey are elongate-ovate, over 2 mm. long when mature, flattened, 

 pale yellow to green, without marginal hairs, not pubescent. He 

 does not state the times of emergence of the adults, but from the 

 data accompanying the specimens at hand, it appears to be April 

 to June. 



TRIOZA KOEBELEI Kirkaldy. 

 Trioza koebelei Kirkaldy *05 :290. 



Very similar to T. magnolise in size and general appearance, dif- 

 fering as follows: Color darker, light brown to dark blackish brown; 

 "head and thorax varying from dark fulvous to blackish, polished, 

 shining; antennae testaceous except apically; femora dark fulvous 

 or blackish brown, tarsi and tibiae testaceous except apices of apical 

 tarsal segments; abdomen smooth, polished, and shining, with a dark 

 bluish-green gloss." Head broader than anterior portion of thorax 

 but distinctly narrower than broadest part; genal cones relatively 

 shorter and more horizontal than in related species (magnoliae); 

 antennag distinctly less than twice as long as width of head. Thorax 

 similar; wings similar, but marginal cells subequal or the second 

 larger. GenitaUa of female similar. 



According to Kirkaldy' s poor illustration, the male genitalia are 

 quite different. 



Described from two females from Cuernavaca, Morelos, Mexico, 

 collected by A. L. Herrera, on Persea gratissima (alligator pear, or 

 aguacate, or avocado), February, 1906. The specimens are much 

 lighter in color than those described by Kirkaldy, but they seem 

 surely to be his species. He describes the head and eyes as being 

 broader than the thorax, but he undoubtedly meant the anterior 

 portion of the thorax and not its broadest part. 



The gall is described as being large, fight brown, ovoid with a trun- 

 cate base, and placed erect usually on the upper surface of the leaves. 

 Height about 6 mm. The insect is said to be very destructive. 



One late nymph, in the collection before me, is darker in color than 

 that of magnolise, and is covered with long sparse pubescent on the 

 dorsal surface. 



Genus CECIDOTRIOZA Kieffer. 



This genus is unknown to me in nature and has not been included 

 in the synoptic table of the genera. As near as can be determined 

 from Kiefier's descriptions, its members come near to Tnoza magno- 



