APPENDIX. 315 



LOPHYRUS, Latr. Leach. 



L. ahdominalis. 9 Antennae 18-jointecl,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 as- 

 cending by two distant narrow lines over the vertex to 

 the occiput ; mandibles piceous at tip ; thorax with large 

 black spots, occupying the greater portion of the surface j 

 scutel pale yellow ; ivings 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. 



Length of the body nearly three-tenths of an inch. 



This species seems to be allied to L. americamis, Leach, 

 but that insect is stated to have nineteen joints to the an- 

 tennae. 



NEMATUS, Jur. 



N. ventralis. Black ; venter and feet pale. 



Inhabits United States. 



"S Hypostoma^ palpi and mandibles at base, whitish ; 

 orbits above and behind piceous ; thorax dilated, triangu- 

 lar line before the wing, and wing scale, whitish ; wings 

 slightly dusky, nervures fuscous ; feet honey-yellow, pos- 

 terior tarsi black-brown ; tergum black, segments each with 

 a yellow band of which the four terminal ones are inter- 

 rupted in the middle ; venter pale honey-yellow. 



Length one-fourth of an inch. 



9 Orbits all round whitisfl ; white line or spot before 



