40 
TRANSACTIONS OF THE TEXAS ACADEMY OF SCIENCE. 
14. Volucella chaetophora Will. — July 7 to 10. On flowers of the Cor- 
dia. (28) 
15. Volucella opalina Towns, (n. sp.). — July 6 to 17. On flowers of 
the Cordia. (32) 
16. Volucella nautlana Towns, (n. sp.). June 28 to July 7. On flow- 
ers of the Cordia. (31) 
17. Volucella cordiae Towns, (n. sp.). — Jnne 30 to July 13. On flowers 
of the Cordia. (29) 
18. Volucella rafaelana Towns, (n. sp.). — July 1. On flowers of the 
Cordia. (30) These last five species, 'Nos. 14 to 18 inclusive, belong to 
a Neotropical group of Volucella so far recorded only from tropical Mex- 
ico. No. 13 connects this group with the obesa group. 
19. Eristalis ornatus Towns, (n. sp.). — July 10. On flowers of the 
Cordia. Nearly allied to E. ochraceus Will., which occurs from Tabasco 
to Brazil. (9) 
20. Meromacrus crucigerus Wd. — July 1 to 18. On flowers of the 
Cordia. Carolina, Florida and Cuba to Texas, and tropical Mexico to 
Tabasco and Yucatan. (10) 
21. Stylogaster ethiopa Towns, (n. sp.). — March 29. (12) 
22. Stylogaster stylosa Towns, (n. sp.). — March 29. (11) 
23. Stylogaster minuta Towns, (n. sp.). — March 29. (13) The genus 
Stylogaster occurs from the lowlands of the United States to Brazil. 
This is the first record from Mexico or Central America. These three 
species were found hovering over and ovipositing in an army of ants, 
Eciton foreli Mayr. 
24. Hyalomyia ecitonis Towns, (n. sp). — March 29. Belongs to a 
Neotropical section of a group of Hyalomyia extending from Western 
North America to the American tropics. Numerous specimens were 
found in company with the Stylogasters, doubtless also ovipositing in 
the ants. (34) 
25. Hyalomyia violascens Towns, (n. sp.). — June 26. Belongs to a 
group which occurs from the lowlands of the United States to the Ameri- 
can tropics. (35) 
26. Trichopoda formosa var. radiata Lw. — July 2 to 4. On flowers 
of the Cordia. (36) 
27. Trichopoda formosa var. inconstans Wd. — July 2 to 6. On flowers 
of the Cordia. (37) These two species belong to the formosa group, 
which occurs from Maryland to Florida, and through tropical Mexico to 
Brazil. 
28. Trichopoda lanipes var. tropicalis Towns, (n. var.). — Jnne 28. On 
flowers of the Cordia. (38) 
29. Trichopoda tegulata Towns, (n. sp.). — July 1. On flowers of the 
