STENOPOGOK— DIZONIAS. 169 



California, and for this reason must be rather common in Mexico. There are no 

 specimens in the collection before me. 



The only species described by earlier authors are : — 



Stenopogon fuscolimbatum, Bigot, Ann. Soc. Ent. Fr. 1878, p. 421. — Mexico. 

 Dasypogon (Stenopogon) truquii, Bellardi, Saggio &c. ii. p. 76, t. 1. f. 10. — 

 Mexico. (This is a Sclerojpogon.) 



ARCHILESTRIS. 



Archilestes, Sehiner, Verh. z.-b. Ges. Wien, 1866, p. 672. 

 ArcMlestris, Loew, Berl. ent. Zeit. 1874, p. 377. 



1. Archilestris magnificus. 



Dasypogon magnificus, Walker, List &c. vi. p. 427 \ 



Dasypogon (Microstylum) magnificum, Bellardi, Saggio &c. ii. p. 79, t. 1. f. II 2 ; Sehiner, Reise d. 

 Novara, Zool. iii. Abth. i. p. 168 8 . 

 Hab. Mexico \ near the city (Craven, Salle), Yautepec (Truqui 2 ), Huastec (de Saus- 

 sure), Ventanas (Forrer). — South Ameeica 3 . 



I have three specimens from Ventanas. These have the third joint of the antennae 

 distinctly beset with hairs on the upperside, although Sehiner asserts the contrary. 



DIZONIAS. 



Dizonias, Loew, Centur. vii. no. 53 (1866). 



l. Dizonias \ 



Hab. Mexico, Presidio (Forrer). 



A single male before me resembles D. Mcinctus, Loew, Cent. vii. no. 54, but differs 

 in having greyish cross-bands at the base of segments 3-6, similar to the whitish ones 

 on segments 2 and 3 of D. Mcinctus ; the lowest hairs of the mystax are white ; a few 

 bristles on the post-alar callus and in front of the scutellum are likewise white ; the 

 segment preceding the male forceps has a fringe of snow-white hairs ; the front coxa? 

 are beset with whitish hairs. 



In my Catal. N.-Am. Dipt. 1878, Note 103, pp. 230, 231, 1 have stated the reasons 

 why I regard D. quadrimaculatus, Bellardi (Saggio &c. ii. p. 80, t. 1. f. 8), as the same 

 species as B. Mcinctus, Dr. Loew's objections notwithstanding. I have also men- 

 tioned specimens where the white abdominal cross-bands are invisible. For these 

 reasons I cannot, without further evidence, treat the specimen before me as a new 

 species. D. Mcinctus has a wide distribution. Van der Wulp had a specimen from the 

 Argentine Republic (cf. Tijdschr. voor Ent. xxv. p. 96); this also has whitish hairs on 

 the front coxae. 



biol. centk.-amer., Dipt., February 1887. z 



