diff --git a/cmd/adapter/adapter.go b/cmd/adapter/adapter.go
index ff2bfc26..2463810d 100644
--- a/cmd/adapter/adapter.go
+++ b/cmd/adapter/adapter.go
@@ -191,7 +191,7 @@ func (cmd *PrometheusAdapter) makeExternalProvider(promClient prom.Client, stopC
 	}
 
 	// construct the provider and start it
-	emProvider, runner := extprov.NewExternalPrometheusProvider(mapper, promClient, converters, cmd.MetricsRelistInterval)
+	emProvider, runner := extprov.NewExternalPrometheusProvider(promClient, converters, cmd.MetricsRelistInterval)
 	runner.RunUntil(stopCh)
 
 	return emProvider, nil
diff --git a/pkg/external-provider/external_series_registry.go b/pkg/external-provider/external_series_registry.go
index d2bb0b39..48bc7993 100644
--- a/pkg/external-provider/external_series_registry.go
+++ b/pkg/external-provider/external_series_registry.go
@@ -18,7 +18,6 @@ import (
 
 	"github.com/golang/glog"
 	"github.com/kubernetes-incubator/custom-metrics-apiserver/pkg/provider"
-	apimeta "k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/labels"
 
 	prom "github.com/directxman12/k8s-prometheus-adapter/pkg/client"
@@ -41,19 +40,13 @@ type externalSeriesRegistry struct {
 	metrics []provider.ExternalMetricInfo
 	// rawMetrics is a lookup from a metric to SeriesConverter for the sake of generating queries
 	rawMetrics map[string]SeriesConverter
-
-	mapper apimeta.RESTMapper
-
-	metricLister MetricListerWithNotification
 }
 
 // NewExternalSeriesRegistry creates an ExternalSeriesRegistry driven by the data from the provided MetricLister.
-func NewExternalSeriesRegistry(lister MetricListerWithNotification, mapper apimeta.RESTMapper) ExternalSeriesRegistry {
+func NewExternalSeriesRegistry(lister MetricListerWithNotification) ExternalSeriesRegistry {
 	var registry = externalSeriesRegistry{
-		mapper:       mapper,
-		metricLister: lister,
-		metrics:      make([]provider.ExternalMetricInfo, 0),
-		rawMetrics:   map[string]SeriesConverter{},
+		metrics:    make([]provider.ExternalMetricInfo, 0),
+		rawMetrics: map[string]SeriesConverter{},
 	}
 
 	lister.AddNotificationReceiver(registry.filterAndStoreMetrics)
diff --git a/pkg/external-provider/provider.go b/pkg/external-provider/provider.go
index 48a544e2..7cc954a7 100644
--- a/pkg/external-provider/provider.go
+++ b/pkg/external-provider/provider.go
@@ -26,7 +26,6 @@ import (
 	"github.com/kubernetes-incubator/custom-metrics-apiserver/pkg/provider"
 
 	apierr "k8s.io/apimachinery/pkg/api/errors"
-	apimeta "k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/metrics/pkg/apis/external_metrics"
 
@@ -79,11 +78,11 @@ func (p *externalPrometheusProvider) selectGroupResource(namespace string) schem
 }
 
 // NewExternalPrometheusProvider creates an ExternalMetricsProvider capable of responding to Kubernetes requests for external metric data
-func NewExternalPrometheusProvider(mapper apimeta.RESTMapper, promClient prom.Client, converters []SeriesConverter, updateInterval time.Duration) (provider.ExternalMetricsProvider, Runnable) {
+func NewExternalPrometheusProvider(promClient prom.Client, converters []SeriesConverter, updateInterval time.Duration) (provider.ExternalMetricsProvider, Runnable) {
 	metricConverter := NewMetricConverter()
 	basicLister := NewBasicMetricLister(promClient, converters, updateInterval)
 	periodicLister, _ := NewPeriodicMetricLister(basicLister, updateInterval)
-	seriesRegistry := NewExternalSeriesRegistry(periodicLister, mapper)
+	seriesRegistry := NewExternalSeriesRegistry(periodicLister)
 	return &externalPrometheusProvider{
 		promClient:      promClient,
 		seriesRegistry:  seriesRegistry,
diff --git a/pkg/external-provider/series_converter.go b/pkg/external-provider/series_converter.go
index 506c7c21..ff4a606d 100644
--- a/pkg/external-provider/series_converter.go
+++ b/pkg/external-provider/series_converter.go
@@ -63,7 +63,6 @@ type seriesConverter struct {
 	queryBuilder      QueryBuilder
 	seriesFilterer    SeriesFilterer
 	metricNamer       naming.MetricNamer
-	mapper            apimeta.RESTMapper
 }
 
 // queryTemplateArgs are the arguments for the metrics query template.
@@ -103,7 +102,6 @@ func (c *seriesConverter) createQueryPartsFromSelector(metricSelector labels.Sel
 
 	selectors := []queryPart{}
 	for i := 0; i < len(requirements); i++ {
-		fmt.Println("This is post Requirements", requirements[i].Key(), requirements[i].Values().List(), requirements[i].Operator())
 		selector := c.convertRequirement(requirements[i])
 
 		selectors = append(selectors, selector)
@@ -246,7 +244,6 @@ func converterFromRule(rule config.DiscoveryRule, mapper apimeta.RESTMapper) (Se
 
 	return &seriesConverter{
 		seriesQuery:       prom.Selector(rule.SeriesQuery),
-		mapper:            mapper,
 		resourceConverter: resourceConverter,
 		queryBuilder:      queryBuilder,
 		seriesFilterer:    seriesFilterer,
@@ -255,13 +252,13 @@ func converterFromRule(rule config.DiscoveryRule, mapper apimeta.RESTMapper) (Se
 }
 
 func (c *seriesConverter) buildNamespaceQueryPartForExternalSeries(namespace string) (queryPart, error) {
-	namespaceLbl, _ := c.metricNamer.LabelForResource(naming.NsGroupResource)
+	namespaceLbl, err := c.resourceConverter.LabelForResource(naming.NsGroupResource)
 
 	return queryPart{
 		labelName: string(namespaceLbl),
 		values:    []string{namespace},
 		operator:  selection.Equals,
-	}, nil
+	}, err
 }
 
 func (c *seriesConverter) QueryForExternalSeries(namespace string, series string, metricSelector labels.Selector) (prom.Selector, error) {