370 THK CANAUIAN KNTOMtlUMilHT. 



lI^MF.NOl'ltRA KokMICOIDEA 



The few ants I collected were kindly delcrmined by Dr. W. M. 

 Wheeler, as follows : 



Camponotui tnaculatus, suhsp. vicinui, var nitit/iventris Emery. 



Formica tufa, subsp. obscutipes Forel. 



F. iubpolUa Mnyr. 



F. /usca, var. argentata Wheeler. 



F.fuica, var. neoclara Kmery. 



Laslui niger, var. neoni^er Kmery. 



Myrmica brfvin-uiii. var. near sulcitiodouifs K.mery. 



1 Ie.MII'TFRA. 



The following were kindly determined by Dr. Van Du/.ee: 

 Ly'i^us pratensis L., var. 

 Ihyreocoris extensa Uhler. 

 Jrbisia brachycerus Uhler. 

 Thamnotettix Belli Uhler. 



A NKW ALEYRODES ON AMBROSI.V. 



BY T. 1). A. COCKEREI.L, UN'IVERblTY OF COLORADO. 



In my garden at Boulder, Colorado, Ambrosia artemisiirfolia L. is 

 one of the most troublesome weeds. I thought it had nothing to recom- 

 mend it, but in this I was wrong, for it supports an interesting new species 

 of Aleyrodes, the pupte of which may be found on the under surfaces of 



the leaves. 



Aleyrodes ambrosia, n. sp. 



Aiiuit. — Hody about 930 /* long ; anterior wing, 1070; eyes divided : 

 second antennal joint large; body very pale yellow, marked wiih gray; a 

 gray transverse band on each side of the head posteriorly ; a pair of dusky 

 spots on mesoihorax ; anterior part of metathorax very dark ; abdominal 

 segments with ill defined dusky bands. Anterior wings white, with six 

 conspicuous gray spots, forming two transverse rows ; the first row, a little 

 before middle of wing, has two spots below the main vein and one above ; 

 the middle of the three is more basad than the others, so that they form 

 the corners of a low tti.mgie ; the lower two spots are subquadrate, the 

 upper is elongate and oblujuc, rather inclined to be divided; the second 

 row of spots, in the subapical field, consists of two large subquadrate 

 ones, and a longitudinal streak (more basad) between them ; there is also 

 a slight dot above the basal end of the streak, and a slight apical spot. 

 Hind wing white, with two faint subbasal spots, the lower one more basad. 



N\>\ ember. IVIO 



