ENTOMOLOGICAL SECTION. XXXV 



T-branched, black and pubescent, each joint from second armed at tip with a long 

 pilose branch, these gradually decrease in size towards tip, becoming obsolete on 

 ninth joint; thorax stout, rounded in front, convex and narrowing posteriorly, 

 pubescent; eollare not visible, parapsidal grooves distinct, a distinct medio-longi- 

 tudinal groove on praescutellum ; scutellum moderately large, roundish ; pleurae 

 margined around the edge with coarse punctures; abdomen small, fusiform, black, 

 smooth and shining; with a distinct but short peduncle ; wings hyaline, no sub- 

 costal vein, stigma same as in 9, the stigmal branch not quite as long as in J: 

 legs brown, posterior femora black, tibiae yellowish. 



This unicjue and interesting little species is the first of the genus 

 discovered in America. 



Described from one % and one 9 bred in March, from the pine 

 aphis L'irhnus anstru/i A.shmead. This pine aphis suifers from the 

 attacks of many internal foes; besides the above I have bred three 

 other chalcids and two ichneumon flies, which will be described in 

 some future paper. 



October U. 1881. 

 Director Dr. LeConte in the chair. 

 The Publication Committee announced the completion of the Trans- 

 actions of the Americau Entomological Society to page 148. 



In behalf of Mr. Ashmead, Dr. Horn presented types of nearly all 

 the species described in the paper jjresented at the last meeting, for the 

 cabinet of the American Entomological Society. 



Dr. McCook exhibiti'd some small Hymenoptera hatched from the 

 nests of Mud-Wasps. He also placc^d bc^fore the meeting the nests and 

 cocoons of some sjtiders. showing the means made use of for their 

 protection and concealment. 



Dr. Horn exhibited a new Ci/chrus from Washington Territory, be- 

 longing to the .sub-genus Sphseroclerm, this being the first known 

 occurrence of the latter west of the Mississippi. 



A female Xenorhipis was also shown. This has the antennjie not 

 very different from Melanophila or Ayrilus while the male antennae 

 are flabellate. 



Dr. LeConte gave his views regarding the dispersion of Coleoptera 

 in times following the glacial epoch. At the time when the present 

 circampolar i-egions were much warmer than now and the continents 

 probably less separated or even joined, the fauna was perhaps the same 

 in the entire region. The glacial invasion extended .farther south in 

 the Atlantic region than in the Pacific, obliterating in great part the 

 Coleoptera of this side of the continent while the Pacific slope was 

 less disturbed. Consequently the species of the latter region being the 



