Jiine,i9i7 Bulletin of the Brooklyn Entomological Society 59 



slender and more nearly parallel-sided in appearance than others of the 

 genus. Viewed from above the subcostal area forms the lateral margin 

 of the hemelytra from humerus to a point just back of widest part. From 

 the side or beneath, however, the deflexed costa can be seen and inspection 

 of its surface reveals a uniseriate arrangement of the areoles. L. mutica 

 has the third antennal joint nearly or quite four times as long as the basal 

 joint. 



This species, which varies greatly in color, being sometimes 

 almost entirely black is very common in the vicinity of Washing- 

 ton, D. C, on fringe-tree (Chionanthus virginica L.) and on 

 various species of ash {Fraxinus). It has been collected on 

 the food plants from May to October, has been found hibernating 

 among old leaves, and the nymphs have been seen from July to 

 September. 



Other specimens seen show that the species occurs also in 

 Nebraska, Wisconsin, Ohio, Ontario, New Jersey, Tennessee, 

 and Texas. ' 



Leptoypha brevicornis Champion. — Leptoypha hrevicornis Champion, G. 

 C. Biologia Centrali-Americana. Insecta. Rhynchota. Hemiptera-Heter- 

 optera. Vol. 2, p. 32, December, 1897 (Omilteme in Guerrero, Mexico, 8,000 

 feet). 



Length (excluding antenna), 2.27 mm.; length of pronotum, 1.13 mm.; 

 width, .82 mm.; greatest width of elytra, .89 mm.; length of antennal 

 joints: i, .099 mm.; 2, .099 mm.; 3, .36 mm.; 4, .19 mm. 



Form not so narrowly oblong as in L. mutica, the pronotum proportion- 

 ally broader. Coarsely punctured, subcostal area largely triseriate; inner 

 margin of membrane with a single series of large areoles which becomes 

 two at apex and merges into the single series of costa which can be seen 

 (from above) to a point just behind greatest elytral expansion. Cephalic 

 spines as in L. mutica. 



Color stramineous to light reddish brown; eyes and callosities black; 

 veinlets infuscated across discoidal areas and on membrane; pruinosity 

 generally distributed. Under surface reddish brown, bucculae paler, pleural 

 spots and mesosternum darker; more or less pruinose. 



L. hrevicornis is smaller than L. mutica; the antenna is shorter 

 and the third joint of antenna is distinctly less than four times 

 as long as the first; a proportion which it nearly or quite attains 

 in L. mutica. However, the two forms are very closely related 

 and it may well prove that hrevicornis is a southern and western 

 subspecies of mutica. 



