CULICID^ THEREVID^. ' 389 
IMpino’s supposed discovery. For account and figure of proboscis, &c., cf, 
Sci. Goss. 1871, pp. 108-110, fig. 65 {of. also ihid. p. 62). 
Limnobiid^. 
Polymera: Loew (Z. ges. Naturw. xxxvii. pp. 263-267, pi. v. figs. 1 & 2) 
recharacterizes and discusses the systematic position of this genus, figuring 
the wing &c. 
Stratiomyid^e. 
The larvae of an unknown Stratiomys found in salt w'ater, Clear Lake, 
California, are described by Packard, 1. c. 
Pachyyaster, Perris, I c. p. 210, does not agree with Macquart or Dufour 
as to the larvae in this genus, in which he has observed antennae &c. ; he 
thinks them closely allied to those of Saryus, and states that the brood is 
annual. 
Pachygaster pinif sp. n,, id. 1. c. pp. 208-212, pi. 3. figs. 80-88, Landes. 
XYLOPIIAGIDiE. 
Xylophagus cmetus. Perris (/. c. pp. 202-207, pi. 3. figs. 70-79) redescribes 
this species, in all its stages, figuring details of the larva and pupa. Chiefly 
from the structure of the larvae, he considers that Xylophagus (a name which 
most likely conveys an incorrect idea) and Stibula might well form types of 
distinct tribes Or subtribes. The larva of X. cmctus Was found in galleries 
of the larvae of Tomicus stenographus ; and, as in other cases, he considers it 
to feed on the excreta of the latter, and to be occasionally carnivorous. 
Tabanid^e. 
Kcematopota plavialis. Perris (Z. c. pp. 196-201, pi. 2. figs. 62-69) rede- 
scribes this species in all its stages, figuring details and discussing its eco- 
nomy. He has found the larva in the frass ” of Hymenorus and Prionycims 
(Col.) larvae in rotten pine; but considers it is carnivorous from its struc- 
ture, and mentions instances of larvae of Tahanidce observed by himself to 
devour larvae of Rhizotrogus., Ilomaloplia, and il/e/oZowZA« vtdgaris. . 
Ilcematopota hieroglyphica, sp. n., Gerstacker, Arch. f. Nat. xxxvii. p. 362, 
Endara. 
Tahanus terminalis, p. 266, Mt. Sinai, nigrifer and poUtuSj p. 266, Ilor 
Tamanib, p. 266, T6r, Walker, Ent. v. : spp. nn. 
Pangonia zonata^ p. 266, sabfasoiatay p. 257, id. 1. c., Tajura : spp. nn. 
THEREVIDiE. 
Thereva conjinisy Fall. [= Psilocephala ardeay F.]. Perris (1. c. pp. 222-226, 
pi. 3, figs. 97-102) redescribes this species in all its stages, figuring, with 
details, the larva and pupa, of which the stigmata are pedunculated. He 
corrects an error of Westwood (Introduction, ii. p. 660), who attributes re- 
spiratory tubes to the apex of the larva of T. jylebeiay and argues from their 
structure that the larvae of species of this genus are carnivorous on occasion. 
Thereva hebes, Loew, nec Walker, is renamed pcecilopa : Loew, Beschr. 
eur. Dip. ii (Berichtig.). 
