PHALACEOMTIA.— VOLUCELLA. 43 

 The following species have been described by Bigot : 



Phalacromyia vicina, Bigot, Ann. Soc. Ent. Fr. 1883 (Phalacromyia).— Mexico. 



melanorhina, Bigot, loc. cit. p. 86 (Phalacromyia). — Mexico. 



Ivolucelloides, Bigot, loc. cit. p. 548 (Glaurotricha).— Mexico. 



The generic distinctions between Glaurotricha and Phalacromyia are, to say the 

 least, very donbtful, and for the present 1 believe the name Glaurotricha should be held 

 in abeyance. 



VOLUCELLA. 



Volucella, Geoffroy, Hist. des Ins. envir. de Paris, p. 540 (1762). 



Cenogaster, Dumeril, Zool. Analyt. p. 282 (1806) ; Dict. des Sciences nat. Strasbourg, vii p 368 

 (1817). 



Temnocera, St.-Fargeau & Serville, Encycl. Meth. x. 786 (1825) ; Macquart, Dipt. Exot. ii. 2 p 26 

 (1842). 



Ornidia, St.-Fargeau & Serville, Encycl. Meth. x. p. 786 (1825). 

 Atemnocera, Bigot, Bull. Soc. Ent. Fr. 1882, p. cxiv. 



of the recognized Central-American species. 



A. Large, inflated species; face, in profile, descending, without 



distinct concavity ahove or tubercle below; antennse small; 

 scutellum without bristles ; second longitudinal vein not sinuous 

 at its extremity; abdomen clothed with short, recumbent, 

 bristly hairs. 



a. Wings with a large dark brown spot 4. quadrata, sp. n. 



aa. Wings with small brown clouds on the cross-veins. 



b. Black and deep red species ; abdomen not banded . . . 1. castanea, Bigot. 

 bb. Largely yellow or reddish-yellow species; abdomen with 

 black bands. 



c. Bed or reddish-yellow species ; head of male very large ; 

 wings strongly infuscated on the basal portion; very 



large species 2. lata, Wiedem. 



cc. Light yellow species ; mesonotum and ahdomen largely 



hlack ; wings not strongly infuscated at the hase ... 3. isabellina, Willist. 



B. Medium-sized species ; second longitudinal vein, near its extre- 



mity, distinctly sinuous, bending into the suhmarginal cell ; no 

 prescutellar hristles. 

 a. Margin of the scutellum without bristles. 



b. Mesonotum thickly yellow-pilose ; second abdominal segmeut 



with a pair of slender crescentic spots ....... 10. ornata, sp. n. 



<?2 



