210 long's second expedition. 



white line ; metathorax with a longitudinal white triangle ; wing< 

 hyaline, nervures fuscous ; the small nervure which divides the 

 first marginal cellule from the first submarginal cellule is abbre- 

 viated and does not reach the margin ; feet pale rufous, tibiae 

 with a white abbreviated line on the exterior side near the knees ; 

 posterior tibiae and tarsi black ; abdomen compressed, acutely 

 edged above beyond the middle ; first and second segments ru- 

 fous. 



Length seven-twentieths of an inch. 



This may be readily distinguished from the preceding species 

 as well by its inferior size and color, as by the remarkable ab- 

 breviation of the dividing nervure of the first marginal and sub- 

 marginal cellules. 



HYLOTOMA Latr. 



H. DULCIARIA. — 9 Pale rufous ; head, wings and feet viola- 

 ceous-black. 



Inhabits North-west Territory. 



Antennae black, with a slight violaceous tinge ; pectus with a 

 large, well defined black spot, tinged with violaceous ; feet hardly 

 tinged with violaceous; abdomen yellow; tail black. 



Length to tip of the wings nine-twentieths of an inch. 



This species was found by Dr. Bigsby, to whom I am indebted 

 for the specimen. It seems to be allied to the pectoralk Leaeh, 

 of which, however, the wings are " luteo-hyalinse." 



LOPHYRUS Latr., Leach. [315] 



L. ABDOMiNALis. — 9 Antennas 18-jointed, pale-yellowish ; 

 thorax with black spots. 



Inhabits North-west Territory. 



Head reddish-yellow ; a large, transverse, black spot above the 

 antennae descending on each side between the antennae and the 

 eyes to the sides of the mouth, and ascending by two distant 

 narrow lines over the vertex to the occiput; mandibles piceous 

 at tip ; thorax with large black spots, occupying the greater por- 

 tion of the surface; scutel pale yellow; wings hyaline, nervures 

 and stigmata fuscous ; thighs dusky at base ; tergum yellow, 

 tinged with rufous, whitish on the lateral margin ; segments pice- 

 ous on their posterior edges. 



