16 Mr. C. H. T. Townsend on Diptera 



nations of the nervules. Underside paler than male, with 

 the cilia of the fore wing black, of hind wing white, with 

 large black spots at the termination of the nervules, and with 

 an anteciliary black line. 



Expanse, cJ ] finch; c? l^lf inch. 



Hab. Batchian, March {W. Doherty). 



Some female specimens have a few blue scales dusted on 

 the disc of the fore wing above. 



This species has long been in collections, but I have 

 nowhere seen it described. 



IV. — Contributions from the New Mexico Biological Station. 

 — No. 2. On a Collection of Diptera from the Lowlands of 

 the Bio N'autla, in the State of Vera Cruz. I. By C. H. 

 Tyler Townsend, F.E.S. 



The following Diptera were all collected by the writer, ia 

 March, April, June, and July, at San Rafael and Paso de 

 Telaya, on the Kio Nautla, about a mile below and above 

 Jicaltepec, but on the opposite or north side of the river. 

 Paso de Telaya is but two miles from San Rafael, and really 

 forms a part of that settlement. This locality is about four 

 or five miles inland from the coast, and about 30 or 40 feet 

 above sea-level. 



Many of the Diptera in this collection were taken, from 

 June 26 to July 19, at San Rafael, on flowers of two closely 

 approximated patches of a shrub known by the native name 

 of harra negra. It has been determined by Dr. J. N. Rose 

 as Co/rZm sp., probably C . ferruginca. Although the flowers 

 of this shrub are small, whitish, and inconspicuous, they were 

 visited by many flies, bees, and other insects. They were 

 about the only flowers in the vicinity from the last of June 

 through July. 



A word may be said about the seasons wliich prevailed 

 during the period of my collecting. Thei^e were occasional 

 northers, accompanied by rain, through J\Iarch and April. 

 No rain fell through ^lay, and not until about June 14, it 

 thus having become very dry, when there came a good rain 

 which lasted two days. After this no more rain fell till 

 July 12, when it rained hard, and continued to rain, some in 

 nearly every twenty-four hours, up to July 20, when I left. 



Tiie Lower Rio Nautla region possesses many tenij)erate 

 forms of insects, and therefore comes well within the limits 

 of the Tamaulipan fauna. Probably its temperate forms fall 

 short of 25 per cent, of the whole fauna. It is of course, 



