1911| Girauli) Species of Trichogranimatilce (Hymenoptera). 149 



Prescription of Pentarthron minutum (Kiley). 

 Normal position. 



Female: — Length, variable, averaging about 0.43 mm., ranging 

 from about 0.27 mm. to 0.80 mm. 



General body color uniformly deep pale cadimum yellow.s 

 sulphur or orange yellow, iridescent in bright lights, varying through 

 brownish to piceous black, the eyes and ocelli a brilliant red, the legs 

 pallid yellowish with the distal tarsal joints slightly dusky, the legs 

 varying to blackish femora and tibia 3 , the abdomen yellow to dilute 

 black or dusky at base somewhat more pallid, the antennas concolorous 

 with the legs, slightly dusky and slightly deeper in color, the club 

 more so. Venation dusky yellowish. Fore wings hyaline, fumated 

 slightly but distinctly proximad, the fumated area extending from the 

 base of the wing distad to the apex of the stigmal vein and involving 

 in the middle area of the wing a pointed projection proximad of the 

 discal ciliation ; most of the fumated area naked ; the area varies in 

 ir tensity, in some specimens barely visible, perhaps absent, in other 

 extremes intense and conspicuous, nearlj' as in the species semi- 

 fumatum Perkins. Posterior wings correspondingly fumated but less 

 conspicuously. Ovipositor concolorous with the legs. 



Sculpture of the body alutaceous, consisting of very delicate stria- 

 tions on the genre ventrad of the eyes, inconspicuous. Clothing or 

 body pubescence sparse, short, scattered bristfy setae. Discal ciliation 

 of the fore wing, across its greatest width, arranged in about from 

 14-16 longitudinal lines, some of which are shortened or else irregular; 

 the cilia are moderately short and uniform, not dense ; the curved 

 oblique line leading caudo-proximad from the end of the stigmal vein 

 contains from 3 to 5 cilia, usually 5 and very rarely 6. Marginal 

 vein proper bearing from the middle of its surface 4 large setre (a 

 5th is present at the apex of the submarginal vein and a 6th on the 

 s + igmal) and between them 2 or 3 short ones, making a total of 6 

 or 7. Caudal wings with but a distinct, complete line of discal cilia, 

 intermediate and nearer the cephalic margin, a second half-complete 

 line caudad, nearer the caudal margin of the wing, faint, and a 3rd 

 cephalic line, present caudad only and containing but from 2 to 4 

 cilia (rarely a maximum of 7). 



Antennas usually sparsely pubescent, the seta? moderately long, 

 soft and irregularly placed, most numerous on the club where they 

 become moderately abundant, giving a bristly appearance. Scape 



5. Sometimes the whole of the cephalic aspect of the head in both 

 sexes contrasts with the general body color by being- pallid (in balsam 

 mounts silvery) as in] the species euproctidis. 



