174 DIPTEEA. 



Synopsis of the Species of Diogmites mentioned below. 



1. Wings altogether brown 1. sattei, Bell. 



Wings not altogether brown 2. 



2. Prevailing colour black ; abdomen uniformly black, shining . 3. memnon, sp. n. 

 Prevailing colour not black 3. 



3. Thoracic stripes coalescent, forming a large deep-black spot on 



the thorax 5. tau, sp. n. 



Thoracic stripes separated by golden lines 4. 



4. Palpi black or dark brown 5. 



Palpi reddish 6*. 



5. Small species, 12-14 millim. ; abdominal segments darker in 



the middle, and therefore with lighter hind margins ... 7. jalapensis, Bell. 

 Large species, about 23 millim. ; abdomen rather unicolorous, 

 the hind margins of the segments but little lighter ... 8. Sp. 



6. Abdomen deep black, with bright golden hind margins to the 



segments; thorax with three deep-black stripes on golden 



ground, the middle stripe bifurcate in front 2. lindigi, Schin. 



Abdomen brownish-red, the hind margins of the segments con- 

 colorous ; thorax with three velvety-black stripes, the inter- 

 mediate stripe reddish in front 6. rubescens, Bell. 



Abdomen brownish, the hind margins of the segments with a dull 

 orichalceous reflection ; thoracic stripes brown rather than 

 black, the lateral ones obsolete 4. cuantlensis, Bell. 



1. Diogmites sallsBi. (Tab. III. fig. 8, s .) 



Dasypogon (Saropogon) sallei, Bellardi, Saggio &c. ii. p. 70 \ 



Hab. Mexico, Northern Sonora (Morrison), Ventanas 2000 feet, Presidio (Forrer), 

 Tuxpango 1 . 



The expression " alis subfuscis ad basim hyalinis " in Prof. Bellardi' s description is 

 somewhat misleading : it refers to the anal angle of the wing, which is sometimes of a 

 paler tinge ; the root of the wing is brown. I have seen the types in Turin. 



2. Diogmites lindigi. 



Dasypogon lindigii, Schiner, Beise d. Novara, Zool. ii. Abth. i. Dipt p. 165 \ 

 Hab. Panama,, Bugaba 800 to 1500 feet (Champion). — South America 1 . 



The description agrees well, except the words " Hiiften weiss schimmernd." The 

 coxse are pale orichalceous. 



3. Diogmites memnon, sp. n., c? $ . (Tab. III. fig. 9.) 



Dark brown; distal half of the abdomen black, shining; yellowish-brown stripes along the dorso-pleural 



suture only ; legs chestnut-brown. 

 Length 20-24 millim. 



Hab. Costa Rica ; Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 



