290 THE CANADIAN ENTOMOLOGIST. 



TWO NEW HOMOPTERA OF THE FAMILY CHERMID^., 

 ONE OF ECONOMIC IMPORTANCE. 



BV G. W. KIRKALDY, HONOLULU, HAWAIIAN ISLANDS. 



Fam. Chermidse. (= Psyllidae of some authors.) 

 Trioza Koebelei, sp. n. (Fig. 14).— The figures of the tegminal 

 neuration and of the male genital segment in profile, and the following 

 brief description, will distinguish this destructive form from the three other 



North American 

 Trioza species. 

 Head and thorax 

 varying from dark 

 fulvous to black- 

 ish, polished, shin- 

 i n g . Antennae 

 testaceous, except 

 apically. Teg- 

 mma and wings 

 hyaline, colourless, nervures brownish. Femora dark lulvous or blackish- 

 brown, tibi^ and tarsi testaceous, except the apices of the apical tarsal 

 segments. Abdomen smooth, polished and shining, black, with a dark 

 bluish-green gloss. 



Head and eyes wider than thorax ; dorsum medio-longitudinally 

 sulcate transversely, about as wide as the eyes, which are a little longer 

 than broad (as seen dorsally) well rounded, and substylate. Frontal 

 cones small, but well developed. Antennae longer than- head, pronotum 

 and dorsulum together nearly, or quite, as long as ])Osterior tibiae, third 

 segment very long. Dorsulum suboval. Anterior femora dilated. 



$, . — Abdomen elongate 3 genital segment (fig. 14) pale fulvous. 

 ? . — Abdomen laterally angulate so that it is roughly diamond- 

 shaped. Genital segments reddish-brown. 



Length to apex of abdomen a little under 3 mm.; length to apex of 

 tegmina in repose, about 6 mm. 



Habitat : Mexico, Morelos (Koebele) ; forms large light brown 

 coloured galls on leaves of Persea gratissiina ("Alligator Pear") and is 

 very destructive. The galls are ovoid, with truncate base, and are placed 

 erect (usually) on the upper surface of the leaf. Height, about 6 mm. 



August, 1905 



