32 DIPTEEA. 



5. Hermetia coarctata. 



Hermetia coarctata, Macq. Dipt. Ex. Suppl. i. p. 50, t. 5. f. 4 1 ; Bellardi, Saggio &c. i. p. 24 ; Schiner, 

 Reise d. Novara, p. 70 2 . 

 Hob. Mexico, Merida in Yucatan *.— South America 2 . 



A single specimen (a female from Presidio, Mexico, collected by Forrer) agrees with the 

 descriptions, with the following differences : the scapus as well as the annulate portion 

 of the third joint of the antennae are reddish ; only the tip of the annulate portion as 

 well as the long lamelliform vane-like style are black ; the palpi are red ; the legs are 

 altogether red, except the coxaB and the base of the posterior femora. The colouring 

 of the head is the same as that of several other Eermetim : there is a greenish-white 

 spot in the middle of the face ; the facial orbits are silvery ; besides the pair of whitish 

 spots on the front near the orbits, there is a similar pair higher on the vertex. The 

 stigma is brown (as Macquart describes it). The short stump of a vein, inside of the 

 discal cell, mentioned by Schiner, is less than a rudiment in our specimen. The only 

 important differences consist in the colour of the palpi and legs, and even these may 

 be due to variation ; the agreement in other respects is so great that I do not doubt of 

 the specific identity, the more so as Macquart's specimen was likewise from Mexico. 



The eyes are green, with purple transverse streaks and dots, which are not placed quite 

 so close together as in E. illucens. 



6. Hermetia illucens. 



Hermetia illucens (Linn.), Wiedem. Aussereur. zweifl. Ins. ii. p. 22, t. 7. f. 3 (for the rest of the 

 synonymy compare O. Sacken, Catal. N. A. Dipt. 1878, p. 46). 



Eab. Southern United States.— Mexico ; Guatemala, San Geronimo (Champion) ; 

 Costa Eica, Cache (Rogers) ; Panama, David in Chiriqui (Champion).— South America. 



I have before me five Central- American examples of this well-known species ; their 

 average size seems to be smaller than that of the specimens from the United 

 States. 



7. Hermetia formica, sp. n., $ . 



Brown, at the hase of the second abdominal segment a transverse, yellowish, pellucid spot ; antennal style very 



narrow, white ; wings yellowish. 

 Length about 19 millim. 



Hab. Panama, Bugaba 800 to 1500 feet (Champion). 



Head broader than the thorax, brown, the face paler ; front beset with brown and black 

 hairs, the face with a yellowish pubescence more dense along the orbits ; the front has the 

 usual bump below the ocelli. First joint of the antennae rather long, the annulate portion 

 of the third joint about as long as the vane-like style; the latter is unusually narrow 

 and pointed, giving the whole antenna a different appearance from that of an ordinary 



