194 KANSAS UNIVERSnV QUARTERLY. 



above, the annulate portion as long as the basal portion. Face 

 shining yellowish. Palpi brownish yellowish, large, Tabanus-like. 

 Mesonotum polished brown, with two narrow whitish stripes in front; 

 on the posterior part with bright yellow pile (it is possible that the 

 yellow pile may be more extensive in perfectly fresh specimens). 

 Abdomen brown with a median light yellow stripe. Legs brown, the 

 hind tibiae blackish. Wings hyaline with the anterior border to the 

 apex, a moderately broad band beginning beyond the end of the 

 first vein and extending into the fifth posterior cell, a cloud on the 

 outer part of the third vein and on the posterior basal transverse vein, 

 dark brown; anal angle subhyaline. Length 9, 10 mm. 



Four specimens, Chapada, Brazil. I cannot find any description 

 which will apply to this species, nor am I confident where it should 

 belong. It has the elongate form and the elongate first antennal 

 joint of Diclie/acera, but lacks the prominent process of the third 

 antennal joint. The front tibiae are slender, wherein it differs from 

 the species of Diaclilonis known to me. 



Stibasoma theotaenia. 



? Tahanus theotccnia Wiedemann, Auss, Zw. Ins. i, 136: Schiner Reise 

 der Novara, Dipt. 98 (Stibasoma). — Montevideo. 



Male. Facets of eyes much enlarged on the upper part, small 

 below; eyes bare. No ocelli. Process of third joint much enlarged 

 and reaching as far forward as the non-annulate portion; style short. 

 Face black, lightly dusted. Palpi black, with black pile. Thorax deep 

 black, with black hair; mesonotum lightly whitish dusted above. 

 Abdomen deep shining black throughout, and with black hair only. 

 Legs deep black; front tibiae dilated; hind tibiae black-ciliate without 

 and within. Wings deep brown, the apex cinereous hyaline. Length 

 16 mm. 



One specimen, Chapada, Brazil. If this is the male of the true S. 

 theottznia, it differs very much in the color of the abdomen, which is 

 given by Schiner as light yellow on the basal segments. As no male 

 has been described in this genus, it is not at all impossible that such 

 sexual differences may exist. That it is neither S. Julvohirtum or S. 

 tristis is evident from the black wings, and, if the species is not ^. 

 theotcenia it must be new, the female unknown. 



Tabanus. 



There are in my collection numerous species of Tabanus from 

 South America, only a part of which I have been unable to identify 

 so far. Notwithstanding this, it is probable that not a few of them 

 have been described, and nothing will be gained by giving names to 

 them now. 



