SUBFAMILY MONOPHLEBINAE 71 



dd. Abdomen of adult female provided with seven pairs of 

 subdorsal spiracles; abdomen with large crescent-shaped 

 valve-like structure located between spiracles; test unknown; 



male unknown. PerissoimcAtmon Newst. 



cc. Antennae of adult female normally with less than eight seg- 

 ments, 

 d. Antennae of adult female normally with seven segments; 

 wax excreted by adult female not prominent; male unknown. 



Monophlebulus Ckll. 



dd. Antennae of adult female with less than seven segments. 



e. Abdomen with caudal end not bearing bifurcate setae; 

 body with mealy covering of wax and with transverse 

 ridges of wax on abdomen; antennae of adult male con- 

 sisting of six segments, sixth segment subequal in length 

 to each of others; male unknown Cockcrellella MacG. 



ee. Abdomen bearing bifurcate or serrate or broadly truncate 

 setae. 



f. Abdomen with caudal end bearing three or four bifur- 

 cate setae on each side of meson; antennae consisting 

 of six segments in first and third nymphal stages, sixth 

 segment twice as long as any of other segments; rostrum 



'consisting of two segments; male unknown 



Newsteadiella MacG. 



ff. Abdomen of adult female margined on each side with 

 bluntly or sharply serrated setae or broad blunt setae, 

 these setae also present in all nymphal stages; antennae 

 of adult female consisting of four to six segments, of 

 second and third nymphal stages of five to six segments, 

 and of first nymphal stage of four to five segments; 

 rostrum apparently consisting of a single segment; 

 adult male unknown. Stictococcus Ckll. 



The foregoing table to the genera of Monophlebinae has made 

 it necessary to change the position of certain of the species. The 

 following list gives their generic reference : — 



Monoplebus Burm. — This genus is limited to males, two species 

 of which, atripennis Burm., the type, of which only males are known, 

 and dubius Fabr., each have two pairs of lateral filaments on the abdo- 

 men, and a third, saundersii Westw., has four pairs of lateral fila- 

 ments. All these species are from the East Indies. The following 

 three species based upon females from Kilimanijaro, Africa, are re- 

 ferred to this genus by Newstead: sjostedti Newst., pallidus Newst.. and 

 africana Newst. A single species, dugesi, from Mexico has been de- 

 scribed by Vayssiere. It is not likely that these latter species are 

 congeneric with the type of Monophlebus. 



Lflaveia Sign. — There are eight species included in this genus, as 

 follows: — axin Llave from Mexico on Spondias, .latropha, mango; 

 bouvari Sign, from Guatemala; cacti Ckll. (not Linnaeus) from the 



