327 



tiiif^ed with yellow; tlie stigma and nervm-es brown. Expands nearly five 



inches. 



Front vesicular, pale brown, lip above base of the mandibles, two trans- 

 verse narrow lines above the lip, and two small spots before the antennae, 

 blue green. Eyes b.lue green above, with a large indigo blue patch before, 

 pale and clear ochre brown below. Thorax brown; with two longitudinal 

 stripes before, and two oblique ones on each side, a spot between the latter 

 near the wings, two small spots at the articulation of each wing, and the 

 scutellar portions blue green. Abdomen brown, with a lateral longitudinal 

 line on each side, and two narrow bands near the base, and one near the tip 

 of each segment, blue green, except the first segment, which has only a 

 short terminal band, and the last three segments, the last of Avhicb is 

 immaculate, and the two preceding eacb with a subterminal band, inter- 

 rupted in the middle so as to form two transverse spots. Anal folioles deep 

 chestnut brown. Legs black. $ with the upper anal folioles tricarinate, 

 narrowed at base, and fringed witb hairs on the inside; lower appendage 

 half as long as the folioles, flattened above and truncated at tip. ? with 

 the anal folioles shorter, lance oval, flat and not hairy. Ovipositor cultri- 

 form, with palpiform appendages on each side. 

 Taken from living specimens, June 10-20, 18^9. 



PSOCUSi Latr. 



This genus is allied to Sialis in form and disposition of its wings. The 

 genus Aphis is its representative among the Hemiptera, to which it has a 

 very remarkable resemblance in general form and appearance, but with an 

 entirely diff-erent oral apparatus. The insects of this genus assemble at 

 certain seasons in swarms about old fences, buildings and trees, particularly 

 such as are decayed or afi-ected with dry rot. The larv* probably live in 

 these places gnawing the wood. The definition of the antenna; m Coquc- 

 bert is incorrect, for in Psocus the antennae are eleven jointed, the first 

 ioint thickest, short, conical; second shortest, turbinated or obconical, not 

 "loncrerthan thick; third and remaining joints nearly cylindrical or seta- 

 ceous, very long and slender, and with articulations which are easdy seen 

 with a good glass, and which become gradually shorter towards the tip, the 

 third being the longest of all. 



iLatreille. was not always con-ect in the formation of new terms; according to the 

 etymology, the name of this genus should be written Psochm. 



