Catalogue of British Ichneumonidee. 159 



supero-medial area laterally defined. Hr. Briscbke says 

 that H. rufocinctus, Ratz., is the male of P. instabilis, 

 and is different from H. rufocinctus, Gr., and that it has 

 an elongated pentagonal supero -medial area on the meta- 

 thorax. Mr. Marshall's insect does not belong to either 

 of these ; the metathorax is very short, has no trace of 

 supero-medial area, and but part of one transverse line 

 is present, and that only at the sides; the true Tlcmi- 

 machus rufocinctus, like P. instabilis, has the abdomen 

 covered with scattered hairs, whilst Mr. Marshall's in- 

 sect is densely covered with pubescence. 



Mr. Bignell has bred two females and a male which 

 may be a variety of Hemimachus rufocinctus, but they 

 are smaller than this insect generally is ; the male has 

 only a flattened depression indicating the supero-medial 

 area, and the female has the legs almost entirely black- 

 brown, and not the greater part red, as is generally the 

 case. I have seen this variety from Dr. Capron and Mr. 

 Billups, and have taken it myself. As I have seen no 

 insect described at all like Mr. Marshall's males, I have 

 added a description and suggest that it should be named 

 H. confusus. Dr. Capron has kindly given me a speci- 

 men of this insect. 



Apex of 1st segment of abdomen, base and apex of 

 2nd, and base of 3rd, reddish ; greater part of front 

 legs, all the tibiae and tarsi, reddish ; stigma fuscous. 

 Antennas about three-fourths the length of the insect ; 

 joints of flagellum shorter than usual ; 1st joint rather 

 more than three times as long as wide ; 2nd and 3rd 

 subequal in length, rather shorter than the 1st, gradually 

 decreasing in length, none of the joints exactly quad- 

 rate, the whole antennas pilose ; head somewhat buccated 

 behind the eyes, a little wider than the thorax. Thorax 

 about as long as high ; mesothorax not trilobed ; meta- 

 thorax very short, almost inclining from base to apex, 

 rough, no trace of supero-medial area ; posterior trans- 

 verse line defined only at the sides ; 1st segment of 

 abdomen elongate, tapering from base to apex ; tubercles 

 more or less distinct ; post-petiole nearly one-half longer 

 than wide. Abdomen elongate-ovate, the 3rd segment 

 the widest, the whole abdomen covered with dense pube- 

 scence ; 2nd segment nearly as long as the width of the 

 apex ; remaining ones transverse. Areolet of wings 

 imperfect ; transverse anal nervure divided one-third 

 from the bottom. The whole insect is opaque, finely 

 reticulate. Male. Length, 3"5 — 4 mm. 



