128 



GUIDE TO CALIFORNIA INSECTS. 



Tenthredo addenda Cr. 



(atlantus — flavomarginis. 

 califormcus — Macrophya 

 diluta Cr. 

 edwardsii Cr. 

 flavomarginis Nort. 



fumipennis Nort. 

 iateraria Cr. 

 obscuripennis Nort. 

 parvula Cr. 

 variata Nort. 

 varipicta Nort. 



NEMATID/E. 



The best known member or the family is the gooseberry sawfly Pteronus 

 ribesii Scop, which does not occur west of Missouri. Our P. thoracicus has 

 been bred from Amelanchier canadensis. The smaller genera may be dis- 

 tinguished as follows: 



Gymnononychus: claws simple. Pristophora: claws with a short tooth. 

 Pontania: length not over 5.5 m.m. Amauronematus: mesonotum and pleurae 

 opaque. 



Pontania produce the common conspicuous galls on willow leaves and 

 Gymnonynchus is our pear sawfly. 



Monograph: — Marlatt, Bull. U. S. Ent. Tech. ser. 3. 



Amandonematis californicus IVlarl. 



coquilletti IVlarl. 

 Gymnonynchus californicus Marl. 

 Nematus edwardsi — Pteronus. 



erithrogaster — Pteronus. 



iridescens — Pteronus. 



mendicus — Pteronus 



pava — Pontania. 



singularis — Gymnonychus. 



thoracicus — Pteronus. 



trivitata — Ptenonus mendicus. 



vertebratus — Pteronus. 



vicinalis — Pteronus. 

 Pontania californicus IVlarl. 



excavatus Marl. 



nevadansis (Cr.) 



pacifica IVlarl. 



parva (Cr.) 



resinicola Marl. 



truncata IVlarl. 

 Pristophora siskyouensis IVlarl. 

 Pteronus californicus Marl. 



edwardsii (Cr.)' 



erithrogaster (Nort.) 



irridescens (Cr.) 



koebelei Marl. 



mendicus (Walsh). 



occidentalis Marl. 



thoracicus (Har.) 



unicolor Marl. 



vancouverensis Marl. 



vertebratus (Say), 

 vicinalis (Cr.) 



Hyiatoma coerulea Nort. 

 Schizocerus crawii (Prov.) 



HYLAMTOMIDyE. 



Sphacophilus crawii- 



-Schizocerus. 



ophyrus edwardsi Nort. 



PAMPHILIID/E. 

 yda bucephalis — Pamphilius. 



pacificus — Pamphilius. 



verticalis — Pamphilius. 



LOPHYRID>E. 



Parrphilius bucephaius (Cr.) 

 pacificus (Nort.) 

 verticalis (Cr.) 

 caudatus Nort. 

 nigricornis Nort. 



