202 University of California Puhlications. [Emtomology 



3 (2). Arolia differently formed or wanting. 



4 (5). Membrane distinctly pilose. Claws destitute of arolia. 



8. Bothynotinae 



5 (4). Membrane glabrous. 



6(7). Pronotum without a collar, but with its apical area gibbous- 

 convex, anteriorly frequently more or less produced above the 

 vertex; always roundedly produced posteriorly but not surpassing 

 the sides, the lateral margins attaining the apical. Arolia short, 

 united to the claws or wanting. First tarsal joint longer than the 

 second. 6. Ambraciinae 



7. (6). Pronotum with or without apical collar; destitute of a gib- 

 bous posteriorly rounded apical area. 



8 (9). Arolia wanting. First joint of hind tarsi long or very long, 



rarely not longer than the second. Tibiae frequently mutic and 

 very distinctly more slender toward its apex. Wing-cell with the 

 hamus wanting or very rudimentary. 7. Cylapinae 



9 (8). Arolia present, rarely wanting, in this case with the first joint 



of the tarsi short, or the wing-cell with a distinct hamus, or the 

 body constricted at the middle. First joint of the tarsi very 

 rarely long, in this case the cell of the wing with a hamus or the 

 arolia present. Tibia very attenuated toward its apex. 



10 (11). Apical joint of the tarsi more or less distinctly incrassate, 



rarely sublinear. Arolia laminate, rarely short, frequently large, 

 always approximate to or connate with the claws. Tibiae always 

 destitute of spines. Lorae confluent with the cheeks. Cell of the 

 wings without a hamus. 5. Bryocorinae 



11 (10). Apical joint of the tarsi linear, rarely a little thicker toward 



its apex, in this case the arolia free and connivent at apex. 

 Tibiae frequently distinctly spinose. 



12 (13). Prothorax with an annular collar at apex, in brachypterous 



females sometimes obsolete above in the middle. Arolia none, or 

 with the arolia varying in length and closely approximated to 

 the claws with which they are connate, at least at base, fre- 

 quently for their whole length. Lorae linear, well distinguished 

 on either side. 4. Macrolophinae 



13 (12). Prothorax without an apical collar, sometimes with the apical 



margin slenderly depressed, in this case with the arolia free and 

 connivent at apex. 



14 (15). Arolia free, slender, parallel or connivent at apex, very rarely 



none, in this case the wing-cell destitute of a hamus, or the body 

 constricted at the middle, or the last two joints of the antennae 

 thicker than the others. 3. Heterotominae 



15 (14). Arolia connate with the claws, very rarely free, in this case 



closely approximated to them, sometimes expanded at apex with 

 the claws minute, falciform; frequently' narrowly laminate, 

 rarely none, in this case the wing-cell furnished with a hamus. 



2. Phylinae 



