DESCRIPTIONS OF NEW SPECIES AND VARIETIES. 



Some systematists have questioned whether descriptions of species 

 in Agricultural Eeports should be recognized. While iny own views on 

 this subject are pretty freely expressed on page 56 of iny Third Missouri 

 Eeport and elsewhere, the publication of this Bulletin affords a good 

 opportunity to bring the descriptions that are scattered through the 

 nine volumes together, with such notes on synonymy as present knowl- 

 edge suggests, and such corrections as are given in the Errata. In the 

 earlier reports the measurements were expressed in inches and hun- 

 dredths of an inch, while in the later volumes the metric system was 

 adopted as most convenient and accurate, and the measurements which 

 follow have all been reduced to this standard. All changes of this 

 character or other changes from the original are included in brackets, 

 while the additional notes are in Long Primer type. 



HYMENOPTERA. 



PORIZON COXOTRACHELI, N. SP. Head pitchy-black, opaque, the ocelli triangularly 

 placed and close together; eyes oval, polished, and black; face covered with a sil- 

 very-white pubescence ; labrum rufous, with yellowish hairs ; mandibles and palpi, 

 pale yellowish-brown ; antennae inserted in depressions between the eyes, reaching to 

 metathorax when turned back, filiform, 24-joiuted; black with basal joints 6-1 be- 

 coming more and more rufous, the bulbus always distinctly rufous ; bulbus rather 

 longer and twice as thick as joint 3; joint 2 about one-third as long. Thorax pitchy- 

 black, opaque, the sides slightly pubescent with whitish hairs, the meso thorax rounded 

 and bulging anteriorly, the scutelluni slightly excavated and sharply denned by a 

 carina each side ; metathorax with the elevated lines well defined and running par- 

 allel and close together from scutelluni to about one-fourth their length, then suddenly 

 diverging and each forking about 'the middle. Abdomen glabrous, polished, very slen- 

 der at base, gradually broader and much compressed from the sides at the apex which 

 is truncated; peduncle uniform in diameter and as long as joints 2 and 3 together ; 

 joints 2-5 subequal in length ; color rufous with the peduncle wholly, dorsum of joint 

 2, a lateral shade on joint 3, and more or less of the two apical joints superiorly, es- 

 pecially at their anterior edges, black ; venter more yellowish : ovipositor about as 

 long as abdomen, porrect when in use, curved upwards when at rest, rufous, with the 

 sheaths longer and black. Legs, including trochauters and coxre uniformly pale yel- 

 lowish-brown with the tips of tarsi dusky. Wings, subhyaline and iridescent, with 

 veins and stigma dark brown, the stigma quite large, and the two discoidal cells sub- 

 equal and, as usual in this genus, joining end to end, but with the upper veins which 

 separate them from the radial cell, slightly elbowed instead of being straight, thus 

 giving the radial cell a quadrangular rather than a triangular appearance. $ differs 

 from 9 only in his somewhat smaller size and unarmed abdomen. Expanse 9 0.32 inch 

 _ 8> m ], length of body, exclusive of ovipositor, 0.22 [= 5.5 mm ] ; expanse $ 0.28 [ = 

 7 mm ], length 0.18 [ = 4.5" 11 "]. 



Described from 399,1^ bred May 26th-28th, 1870, from cocoons received from Dr. 

 64 



