42 



from about the middle of the stigma, but fades out before the tip, 

 stigma yellowish or fuscous, white on the basal part. Length 

 4-6 mm. 



Male l)lack, the front tilnae rufcscent, the extreme tips of all 

 the femora also pale, basal joint of middle and hind tarsi and the 

 second more or less, white. Head, mesonotum, and scurellum all 

 similarly sculptured, and pubescent, the sculpture appearmg as a 

 dense rugosity or rugose puncturation ; scape of antennae about 

 as long as the fourth joint, the second ovate, the third rather 

 more than one and a half times the length of the fourth, and 

 fully three times as long as wide. Towards the apex of the anten- 

 nae the joints become gradually more slender. I'arapsidal fur- 

 rows mdistinct, but, if examined from the front, they can be 

 traced as converging lines to the hind-margin of the mesonotum, 

 w'here they are still widely separated ; propodeum strongly rugose. 

 Wings with the stigma blackish fuscous, the radius angulated 

 before the middle and reaching only about half way from its 

 base to the tip of the wing. Abdomen ovate, very finely punctur- 

 ed, and clothed with short hairs, basal segment angularly bent 

 about the middle, its basal face impressed. Length 3 mm. 



HAB. Xogales, Arizona ; collected on grass and bred from 

 nymphs of Auipliiscepa bkiffafa. The larval sac is placed beneath 

 the tegmen or wing ; number 2446. 



2. Hcspcrodryliiiis aricoiiicus sp. nov. 



Colour, form, size and for the most part the sculpture, as in 

 the preceding species, fourth and fifth antennal joints entirely 

 white or with a dark line, the antennae no doubt varying in coloui, 

 as they do in H. ainphisccpac ; propodeum with loose reticulate 

 rugosity about the middle of the dorsum. Chelae quite unlike 

 those of H. auiphisccpac, the fifth joint v.ith a curved edge be- 

 neath, bearing the lamellate denticles, the chelar claw well and 

 almost evenly curved, its lower edge on the basal half somewhat 

 serrate and witli a few spinose bristles and with no trace of a 

 tooth near the apex. 



HAB. Xogales, Arizrna: lired from the nym])hs of Misihar- 

 nophaiitia sonoraiia: the larval sac is black and placed beneath the 

 wing or tegmen. I cannot certainly decide whether the males 

 under the number 2481, belong to this species wholly or in part, 

 or to the preceding. They do not agree altogether in details 

 amongst themselves and the possibilit}- of either species of th.c 

 parasite attacking l:)Oth of the hosts is so great, that the male [ 



