86 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Male genitalia similar, except posterior lobe of anal valve is nar- 

 rower; forceps similar in shape, but apex not toothed, with one 

 indentation anteriorly. Female genitalia similar. 



Described from one paratype specimen (female) from Orono, Maine 

 (Patch), collected on Amelanchier canadensis (Linnaeus) Medicus, in 

 July; several from Washington, D. C. (Koebele), April 6-27, 1885; 

 and Maryland (Koebele), February 22, 1884; these bear the manu- 

 script name of Trioza amelanchieris Riley, indicating probably that 

 they were taken on Amelanchier, although there is no data to indicate 

 this fact. 



This species is remarkably closely related to T. frontalis, but seems 

 to be quite distinct, nevertheless. Miss Patch ('11: 19-20) has 

 recorded some interesting and valuable life-history data for this 

 species, which is well worth quoting here. 



The nymphs of this species were found in all stages upon the leaves of Amelanchier 

 canadensis. They were collected by Mr. William C. Woods, July 6-27, 1910. They 

 fed upon the ventral surface of the leaves where their presence was readily detected 

 on account of the beautiful white, floss-like wax filaments that curled softly up from 

 the margin of their bodies. These wax filaments are secreted by wax glands which 

 extend in a single marginal row in the earlier stages, but which in the later stages 

 occur both on the margin and for a considerable distance mesad on the dorsal surface 

 of the body. A crescent-shaped area of wax glands surrounds the anus in all the 

 nymphal stages. 



TRIOZA LOBATA, new species. 



Figs. 140, 143, 401. 



Length of body 2 to 2.7 mm.; length of forewing 3.1; width of 

 head 0.76. General color light yellowish brown; abdomen greenish 

 ventrad; sternum partially, genital segment in both sexes, antennal 

 segments IX-X and tips of IV-VIII black; fore wings extensively 

 maculated with brown and numerous round darker spots scattered 

 over the maculae. 



Head a little narrower than thorax; vertex large, not quite twice 

 as broad as long, pubescent conspicuously, with a shallow depression 

 on each side of median line, emarginate in front; genal cones scarcely 

 two-thirds as long as vertex, separated somewhat at base and diver- 

 gent, rounded at apex, pubescent. Antennae a little less than twice 

 as long as width of head, conspicuously ringed. 



Thorax rather strongly arched, covered sparsely with rather long 

 hairs. Pronotum short, strongly descending cephalad. Meso- 

 thorax large. Legs short and thick; hind tibiae with two thick black 

 spines at apex on inner side and one on outer side. Wings large, less 

 than two and a half times as long as broad, broadly angulate at apex, 

 veins heavy; maculated conspicuously (fig. 401); marginal cells large, 

 subequal; Rs long. 



