TRIBE ASPIDIOTIN1 397 



h. Pygidium with pectinae or plates in median in- 

 cisura. 



i. Pygidium with two pectinae in median incisura. 

 j. Pygidium with genacerores (6-14)5-11. 

 k. Pygidium with median pair of lobes dis- 

 tinctly longer than broad. 



I. Pygidium with each lateris with three 

 pectinae; median pair of lobes long and 

 broad, broadly rounded, mesal and lateral 

 notches, latter largest; second pair of 

 lobes large, blunt, rounded, lateral notch; 

 third pair of lobes small, triangular; 

 pectinae of third incisurae longer than 

 lobes, unapectinae, others subequal, ar- 

 ranged 2, 2, 3, 3, those of each lateris 

 narrower ; genacerores ( 6-8 ) 5-5. New 

 Mexico on Chilopsis coloratus Ckll. 



II. Pygidium with each lateris with seven 

 or eight pectinae; median pair of lobes 

 elongate, distinctly longer than broad, 

 distinct mesal and lateral notches, distal 

 end bluntly pointed; second pair of lobes 

 smaller, longer than broad, distinct lat- 

 eral notch, distal end bluntly pointed; 

 third pair of lobes subequal to second; 

 triangular, entire; pectinae deeply laci- 

 nate, arranged 2, 2, 3, 7-8, those of third 

 incisurae and lateres unapectinae; anus 

 distant from caudal margin four times 

 its width; genacerores (12-14)9-11. 

 Dahomey, Africa on Elaeis 



elaeidis Marchal. 



kk. Pygidium of adult female with median pair 

 of lobes as broad as or broader than long. 

 1. Pygidium with only a single pectina 

 cephalad of each third lobe; median pair 

 of lobes broader than long, quadrangu- 

 lar, deep lateral and faint mesal notches, 

 distal margin rounded; second pair of 

 lobes broadly rounded, broader than long, 

 distinct lateral notch; third pair of lobes 

 minute, bluntly rounded, entire; setae 

 large, longer than lobes; pectinae sub- 

 equal in length or slightly longer than 

 median lobes, arranged 2, 2, 2, 1; lateres 

 distinctly crenulate; genacerores (6-6)5-6. 

 Specimens from Madagascar have lobes 

 longer, entire, longer pectinae, and gena- 

 cerores (2-4)4-8. German East Africa, 

 Madagascar on Cocos varians Lindgr. 



