THE SAWFLY GENUS HOPLOCAMPA. 147 



Hoplocampa (?) atriceps Kirby. 



Eoplocampa (?) atriceps Kirby, List Hym. Brit. Mus., vol. 1, p. 108, 1882, no. 19, 9 ; 

 pl.8, fig. 18. 



Examination of the type of this species proves that it is the same as 

 Strongylogaster uncus Norton. 



Hoplocampa lenis (Cresson). 

 Hoplocampa spissipes (Cresson). 



These two species placed in Cresson's catalogue (1887) in Hoplo- 

 campa belong to Lycaota Konow. 



Hoplocampa gentilis (Cresson). 

 Hoplocampa montana (Cresson). 



These two species placed in Hoplocampa by Cresson (1887) belong 

 to ZascJiizonyx Ashmead. 



Tenthredo (Allantus) obtusa Klug. 



Tenthredo (Allantus) obtusa Klug, Mag. ges. Nat. Berlin, vol. 3, p. 55, 1814. 



This species has been placed in Hoplocampa by Konow (1005). 

 King's original description says: "Die zweite Kubitalzelle nimmt zwei 

 zuriicklaufende Nerven auf, von welchen der zweite diclit von dem 

 Anfang der dritten Zelle sich einsenkt, " which excludes it from 

 Hoplocampa. 



SYNOPTIC TABLE TO THE NE ARCTIC SPECIES OF THE SUBGENUS 



HOPLOCAMPA. 



Males 1- 



Females 7 . 



1. Hypopygidium not regularly rounded apically, more or less angled at the sides 



and apical middle -■ 



Hypopygidium regularly rounded apically « 3. 



2. Antennae very slender; mesonotum almost entirely pale; hypopygidium obtusely 



angled apically occidentalis Rohwer. 



Antennae more robust; mesonotum black; hypopygidium more acutely angled 

 apically '. montanicola Rohwer. 



3. Clypeus nearly truncate, broadly arcuately emarginate (ocellar basin almost 



wanting) 4. 



Clypeus deeply emarginate, the emargination subangulate 5. 



4. Mesopleurae and pectus black; hypopygidium truncate..-, bioculata Rohwer. 

 Mesopleurae and pectus pale; hypopygidium rounded californica Rohwer. 



5. Third antennal joint distinctly longer than the fourth; stigma narrow, broadest 



basad of middle marlatti Rohwer. 



Third antennal joint subequal in length with the fourth 6. 



o To determine this the hypopygidium should be viewed at right angles. \Mien 

 the hypopygidium is not regularly rounded, the sides are subparallel and the apex 

 slopes off obliquely to an angulate middle. 



