THE CANADIAN ENTOMOLOGIST. 13 



- A collection of 7 1 gall masses made in Taylor's woods north of 

 Toronto, 13-9-90, resembled artichokes or small white potatoes ; thc' 

 interior white, about the consistency of raw potato. Each nodule con- 

 tained from 1-3 cells; cells small, closely confining larva. 



These gave producers 13-5-91 — 20-5-91 ; parasites 19-5-91 — 1-6-91. 

 $ producers were more numerous than ^ s. 



A collection made from several localities near Toronto from stems 

 oi Nabahis altissimns growing on clay soil in open woods, 5-4-91, of 87 

 nabalus stems gathered 68 were gall bearing. The galls, as usual, a mass 

 of rounded nodules surrounding base of stem an inch or two under 

 ground; occasionally a few nodules on one side of stem, rarely a few 

 nodules extend into pith canal. 



These gave parasites, Eurytoma, 5-5-91 ', producers first out 12-5-91 ; 

 producers, 29 ^ s and 5 c? s ; out, 25-5-91 ; numerous parasites 9-6-91 

 — 25-6-91. One Eitrytoma 22-7-91. 



This lot of 68 gall masses containing probably 1,000 cells, gave of 

 ptoducers 153 $s and 81 ^ s, and of parasites, of 3 species, 185 ^^s and 

 $ s, a total of 419 specimens. 



When collected in the fall season these galls may be kept in moist 

 sand in a glass jar, but the occupants seem to be hardy, and do not 

 appear to be injured by the drying of the gall. However, it is best to 

 collect in April or early in May. 

 , These galls have been increasing during the last ten years, and have 

 now probably reached a maximum. The parasites are now becoming 

 more numerous. The producer is held to be an undescribed species of 

 Aulax, for which I propose the name A. nabali. 

 . The following is a description: — 



$. Length 2.50XX. Antennae 13 jointed, uniform brown, head and 

 thorax black, abdomen shining brown, with a large anterior dorsal spot 

 black ; all the tibicC, femora and tarsi brown, a little paler than the abdo- 

 men ; wings ample, veins well defined, hyaline, irridescent at certain 

 angles. 



Abdomen of ^ darker brown, and without the dark dorsal spot. 

 From numerous specimens. 



I have bred from this gall numerous specimens of the Braconid 

 Dacnusa crassitela, Prov. 



Provancher in his original description of this species gives Ottawa as 

 the locality and Guignard as the collector. He does not say how the.; 



