SYNOPSIS OF NORTH AMERICAN SYRPHIDiE. 287 



1878. 



89— Crioprora Osten Sackeu. Cat. Dipt., 136. North America. 



39.— Acrothordoiiodcs Bigot, Bull. Soc. Eut. Fr., No. 13, 131. S. America. 



1879. 

 90.— Merapioidus Ics^ Bigot, Bull. Soc. Eiit. Fr., No.G, 64. North America. 



1881. 

 91.— Solenaspis Osten Sackeu, Auu. d. Mus. civ. d. stor. nat. Genoa, 442. New 



Guinea. 



1882. 



Sn—Brachymijia Willistou, Canadian Entomologist, xiv, 77. North America. 



3\.—Hadronujiti Williston, ibid., 78. North America. 



98.— Eugeniamyia \_Eugeniomiiiu'\ Willistou, ibid., 80. North America. 

 Z.—Anc!iclosijrplim Bigot, Bull. Soc. Ent. Fr., No. 6,78. Europe. 



37.— Jiurhinomallota Bigot, ibid., 78. Mexico. 



92. — Simosyrphus Bigot, ibid., 70. 

 3.—Ificli!i)-osiirphus Bigot, ibid., 78. Europe. 



93.— Ptilostylomyia Bigot, ibid., No. 12. Spain. 

 2.—Atemnocera Bigot, ibid. South America. 



94.-Doliosyrplius IDolyosiirjjhus'] Bigot, ibid.. No. 13. Central America. 



95.— Tigridemyia ITigridimyia, Tifjridianujia'\ Bigot, ibid. Java. 



96.— Priouotomyia IPrionotomys'] Bigot, ibid. Senegal. 



97.— Eumeiosyrphus Bigot, ibid.. No. 14. India. 



10. — Asemosyrphus Bigot, ibid. Mexico. 



S9.—IiOmaleosy)phHS Bigot, ibid. Mexico. 



99.— Ortholoplius Bigot, ibid. Chili. 

 100.— Kirimyia Bigot, ibid., No. 1.'). Japan. 

 101. — Endoiasimyia Bigot, ibid. India. 



1883-1886. 



10.— Eurhimyia Bigot, Bull. Soc. Eut. Fr., No. 3. Europe. 



26.— Cartosyrph us Bigot, Aunales Soc. Ent. Fr., 230. Europe. 



27.— Euccraiomyia WUliston, 1884, Wien. Eut., Zeit., iv. North America. 

 102.- Nausigaster Willistou, 1885, Trans. Amer. Eut. Soc. North America. 

 103.— Chalcomyia Williston, Bull. Brookl. Ent. Soc, vii, 133. North America. 

 104.— Triodonta Willistou, ibid., 1886, p. 136. North America. 

 105.- Lepromyia Williston, ante, p. 31. North America. 

 106.- Cyuorhina Willistou, ante, p. 209. North America, Europe. 

 107. — Neoascia Williston, ante, p. 111. 



DEFINITION OF TERMS. 



Holoptic.-Contigmtj of the eyes in the male, between the vertex and the antennae. 



Dic/iopiic. —Separation of the eyes by the front in all females, and some males as in 

 €halcomyia, HelopMlus, Triodonta, Criorhina sp., etc. 



Vertex.— The uppermost border of the head between the eyes. 



OceUL— Three small, simple eyes near the vertex on the upper part of the front. 



Front.— The space included between the eyes, the vertex, and the antennae. 



Vertical triangle.— In the male the snuiU triangle upon which the ocelli are situated, 

 limited behind by the vertex, in front by the eyes. 



Frontal triangle.— In the male the triangular space between the eyes below, limited 

 by a line drawn through the base of the antennae. 



Frontal <A antennal process.— The more or less pronounced projection upon which the 

 antennse are inserted. 



