I O LONG. 



The larvae are gregarious and live on the under side of dry cow 

 dung from August to December, but are more abundant during 

 November and December, though not so common as C. brumalis. 

 The larvae of both species are sometimes found under the same 

 piece of dung but usually each species is found alone. This 

 species is described here at length as Mr. Coquilett has given 

 only a brief description of the male. 1 



CERATOPOGON STENAMMATIS, sp. nov. 



Larva : 5 mm. long, anal segments with two cylindrical feet, tips armed 

 with black claws ; feet .15 mm. long; thoracic legs .45 mm. long; color 

 dirty white ; head and mouth parts dark brown. Head with two smooth, 

 short, slightly enlarged bristles, one anterior and the other posterior, to the 

 typical head spine, besides a few scattered simple bristles. Either side of 

 body with two longitudinal rows of elongated setigerous tubercles, the 

 dorsal row with only one hyaline acerose bristle to each tubercle, the 

 lateral row with two bristles to each tubercle, one from apex similar to 

 dorsal bristle, the other simple and of a brownish color and from the pos- 

 terior side of the tubercle ; there are besides several scattered simple bristles 

 along the ventral and subventral surface. 



The specimens were received from Dr, W. M. Wheeler, who 

 found them in the nest of an ant (Stenamma fiihnm subsp. 

 aqidd) at Colebrook, Conn., August, 1900. They were moving 

 about in the refuse heaped up by the ants in certain portions of 

 their nests. The species seems to be a genuine myrmecophile 

 like the European species (C. Braneri Wasmann). 2 

 CERATOPOGON TEXANUS, sp. nov. 



$ , length 2.5 mm. ; wing, I.3X.4 mm. ; ? length 2 mm., wing I-35X 

 .5 mm. ; wings and entire insect densely pilose ; one subcostal cell, third 

 or cubital vein terminating distinctly before the middle of the wing ; no 

 white spot at apex of costal vein ; halteres white ; metatarsi slightly longer 

 than succeeding joint ; tibia of the female without lanceolate scales. 



9 , head dark brown, pile brown ; joint I of antennae large globose ; joints 

 2-10 globose, graduating to globose-ovate, subequal ; joints 11-14 ovate- 

 oblong, apical one larger. Sense organs and arrangement of pile as in 

 C. brumali*. Second joint of palpus in female much enlarged. (See 

 Fig. 6.) Mesonotum drab, with short, appressed, light yellow pile, inter- 

 mixed with some stouter black hairs ; scutellum drab, with several rows of 

 long black hairs ; sides of prothorax with a bunch of hairs ; pleurae naked, 



Wide, "Some New Diptera," Proceedings of the National Museum, Vol. 

 XXIII., 1901, p. 601. 



2 Vide, " Eine myrmecophile Ceratopogen-Larve," Wiener Entomologische 

 Zeitung, XII. Jahrg., 8. Heft (10 October, 1893) pp. 277-279. 



