Pomona College Joitrnal of Entomology 769 



of VI comprises a little more than a third of the entire article and not as long 

 as base. The sensoria on III are usually confined to the basal half of the ar- 

 ticle; large, somewhat elongated and the numbers vary as follow: 3 articles 

 had fi. 6 had 7, 11 had 8, 13 had 0, 5 had 10, 3 had 11, and 1 had 12. None were 

 found with less than six and none with more than 12. From 7 to 9 is the aver- 

 acfc. One sensorium on article V and tlie usual nuinlicr' in llie process of VT. 

 Rostrum — Yellow with cxtreinc tip dark, reahcin^ just beyond the first coxiP. 

 Prnfhora.r — Graduall.v widening from the base of the head to the mesothorax, 

 not as wide as the latter, yellow with two lateral dorsal lilack bands extending 

 from the anterior almost to the base. These bands are narrow and do not reach 

 to the mesothorax. Mesothorax — Well developed, yellow, the lobes sometimes 

 pinkish or i-icher yellow. Metnthorar — With well developed muscle lobe or 

 .scutellum. Slightly deeper yellow than the body proper. Ahrlonien — Well 

 rounded, widest near the middle, bright yellow without darker dorsal mark- 

 ings, except a dark spot where the cornicles should be and even this is very 

 obscure. Cornicles — Simply indicated by dusky spots on the abdomen. Legs 

 — Normally long and haired; coxa? yellow, color of the bod.v; femora dusky 

 yellow or light yellow at base with apical tip almost black; tibiae black — tarsi 

 black. These markings of the legs are constant and very characteristic. The 

 dark spot on the femora is simply a black band around the extreme apical tip. 

 Wings — Normal for this gemis. Primary — Length 2.5 mm., width 0.9 mm. 

 Costal vein black and heavy to the base of the stigma ; subcostal vein light yel- 

 low from base of wing to stigma, wide; .sHfirma-sub-hyaline, lightest in middle, 

 dusky around edges with a dark spot or blotch at the tip of the subcostal 

 (lower base of the stigma) and dark apical margin from the base of the third 

 discoidal to the wing margin : sharp angle at base of stigmal vein and at 

 apex : nearly a parallelogram, with angles very sharp at base of stigmal 

 vein and at tip; stigmal vein nearly obsolete, but most distinct through- 

 out its apical half, short and deeply curved, almost a semi-circumference, 

 arises from near the apical end of the stiarma where it forms a very sharp 

 angle: first discoidal is very dark with margins narrowly and heavily 

 clouded, arises from the subcostal at twn-thirds its len<rth from the base, nearly 

 straight: second discoidal as dark as the first with a dark narrow border, arises 

 near the base of the stignui and curves inwardly: third discoidal heavily 

 clouded at its base, only becoming lighter and very narrow towards the tip, 

 branching very variable, the first branch usually arising near the middle, and 

 the second branch just before the middle of the first. However, the second 

 fork is sometimes very near the tip of the wing and aeain it may be near to the 

 third vein proper. In one such case the vein was thrice branched, the third 

 branch arising very near the wing margin. Only one such instance was found. 

 The drawinsr shows the normal wing. The stigmal vein and the tips of the 

 third discoidal and its branches are amber brown with darker .spots at the 

 apices of all the veins. Secondary— hen^ih 1.7 mm., width 0.5 mm,, very light, 

 with dusky tips: subcostal light amber, with sharp downward bend two-thirds 

 the distance from base to tip ; first discoidal arises from the subcostal beyond 



