TRIBE ASPIDIOTINI 405 



ee. Pygidium with median pair of lobes longer than broad, 

 bluntly rounded, distinct lateral notch; second pair of lobes 

 similar in form, one-half size first pair, lateral notch broad ; 

 pectinae subequal in length to lobes, arranged 2, 2, 3, those 

 of each lateris largest; dorsal oraceratubae prominent; 

 anus distant four or five times its width from caudal mar- 

 gin; genacerores 0-3(5-6)3-5. California on Quercus, 

 Pasania. densiflorae Bremner. 



cc. Pygidium with plates in each second incisura; median pair of 

 lobes large, projecting, rounded, mesal margins parallel, promi- 

 nent lateral notch; second pair of lobes much smaller, about as 

 broad as long, distal margin sinuate; two minute furcapectinae 

 in median incisura, shorter than or subequal to lobes, two 

 plates in second incisurae, and three pectinae on each lateris; 

 lateres cephalad of pectinae denticulate; genacerores (7-9)7-9. 

 West Indies on Saccharum. saccliari Ckll. 



bb. Pygidium with plates in median incisura. 



c. Genacerores (5-5)5-5; median pair of lobes large, prominent, 

 distant, rounded, lateral notch; second pair of lobes small, 

 rounded; pectinae small, poorly developed, similar to plates, ar- 

 ranged as in hederae, thus 2, 2, 3, 6; genacerores (5-5)5-5. 

 Chili. latastei Ckll. 



cc. Genacerores 0-1(8-12)6-9; median pair of lobes large; second 

 pair of lobes much smaller; plates present between the lobes; 

 dorsal oraceratubae numerous, arranged in four rows on each 

 side, extending from margin, those of same row varying greatly 

 in length. Spain on walnut. juglandis Colvee. 



aa. Pygidium without pectinae or plates in median incisura. 



b. Pygidium with second pair of lobes longer than median, project- 

 ing farther caudad, rounded at distal end, entire; median pair of 

 lobes longer than broad, faint lateral and mesal notches, bluntly 

 rounded; pectinae broad, deeply lacinate, arranged 0, 1, 4, caudal 

 pectina of each lateris very broad, others narrow; anal opening 

 about twice length of median lobes from caudal margin; gena- 

 cerores (5-6)4-4. New York, Ohio, Illinois, Iowa on maple 



comstocki Johns. 



bb. Pygidium with median pair of lobes extending much farther 

 caudad than second pair, quadrangular, mesal and lateral notches, 

 adjacent; second pair of lobes broad, distal end oblique, sub- 

 truncate, slightly emarginate; pectinae longer than lobes, ar- 

 ranged 0, 2, 2; genacerores (3-4)2-3. Jamaica, Dominica, New 

 York, Iowa on cocoanut, pomegranate punicae Ckll. 



SPECIES OF UNASPIDIOTUS 



Pygidium with median pair of lobes dark yellowish brown, subadjacent, 

 feebly convergent, projecting far, no mesal notch, single lateral notch; 

 other lobes replaced by short, colorless, plate-like, one or two pointed 

 processes; plates and pectinae numerous, colorless, undivided, blunt, 

 last three frequently somewhat thickened, those near median pair of 



