348 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Bradley, Philadelphia, 1901. The head is of the usual reddish -brown 

 color; the pale yellow antenna long and cylindric. the second joint about 

 one-third the length the first; the third is a pointed process at the tip of 

 the second. The fans have about forty rays, the cilia being relatively 

 minute. The mandibles are provided with three large apical teeth be- 

 sides the row of secondary ones; the apical pair of bristles are present. 

 Z'he maxillary palpus has a few spines, and a tuft of a few spines on 

 the basal joint. Hypopharynx and labrum apparently like those of other 

 species. The labium has an elongated middle tooth, those at the end nearly 

 as long, the intei'mediate ones short (pi. 35, fig. 2), and there are six 

 bristles in each of the two longitudinal rows on the ventral surface. The 

 three blood gills at caudal end are unbranched. 



Pupa. The thoracic respiratory filaments each consist of a single 

 main trunl;, from which arise eight branches, each of which divides into 

 two, thus making sixteen twigs in all (pi. 35, fig. 1). Near the basal 

 margin of the last two abdominal segments are a few caudal-projecting 

 dorsal hooks and on the tip of the last segment is a pair of blunt spines. 

 The pupal case is of the wall-pocket type, fr-om which the respiratoiy 

 filaments of the pupa project. Judging from the number of respiratory 

 filaments of the pupa, the species described by Osten Sacken in Ameri- 

 can Entomologist, volume 2, seems to belong here. 



List of the North American Species of Simuliid^, Genus 



SiMULIUM. 

 Latreille, Hist. Nat. Crust. Ins. (1804), 14:294. 

 ^argtis Williston. N. Am. Fauna. No. 7, May, 1893, p. 2.53. Cal. (Syn. 

 of S. vittatnvi Zett., according to Coquillett, Harriman Exp. 1900, 

 p. 393.) 

 avgyropeza. See rcptans. 

 *hracteatum Coquillett, U. S. Dept. Agri. Div. Ent. Bui. 10, n. s. 1898, 



p. 69. Mass., Cal., N. Y., Kan., Mich. 

 calceatum. Harris. A catalogue name, according to Riley, Am. Ent. 



1870, p. 467. 

 cwcta. See reptaiis. 

 *cinereiim Bellardi, Saggio di ditterologia Messicana, 1:13. Cal. (Town- 

 send, Baja, etc., 1893), Mex. (Bellardi). 

 columbacheiisis Fabricius nee. Schonhauer. See reptans. 

 decorum Walker. List of Dipterous Insects, etc., ptl., 1848, p. 112. 

 Hudson Bay Ter. (Syn. of S. vittatum, Zetterstedt, according to 

 Coquillett, n. s., Bui. 10, 1898, p. 68.) 

 elegans. See reptans. 

 erythrocephala. See reptans. 

 *fi(lrnm Coquillett, U. S. Nat. Museum Proc. 1902, 25:96. 



1898 ochracenm Coq. not Walk. Mont., Id., Col., N. M., Alaska. 

 *glacum Coquillett, U. S. Nat. Museum Proc, 1902, 25:97. Missouri. 

 *griseum Coquillett, U. S. Dept. A.gric. Div. Ent. Bui. 10, n. s. 1898, 

 p. 69. Col. 



Note. — Those names marked * I consider either a distinct species, or not sufficiently 

 described to warrant placing as the synonym of another. 



