HERMETIA. 29 



Thorax brownish-black, sometimes reddish behind the humeri ; on the anterior part of 

 the dorsum are three short stripes of appressed golden pubescence (the intermediate one 

 reaching the suture, the lateral ones oblique and extending only a very short distance 

 behind the humeri) ; fringes of similar golden-yellow pile along the dorso-pleural and 

 meso-pleural sutures and in front of the scutellum ; the interval between the latter 

 fringe and the red scutellum is deep black ; pleurae, sternum, and metanotum dark brown ; 

 mesosternum and metanotum beset with golden pile. Halteres with a yellow knob. 

 Coxae dark brown with golden pile ; legs rufous ; hind tarsi whitish-yellow at the base ; 

 in darker specimens the hind femora are infuscated on the distal half, and the other 

 femora and some of the tibiae show traces of brown. The anterior half of the wing, as 

 far as the fourth vein and including the discal cell, is brown, slightly ferruginous at the 

 base and along the costa ; the apex and the posterior margin are of a paler brown ; 

 between the two colours there is a cuneiform hyaline stripe, which begins in the third 

 posterior cell, crosses the fourth and fifth near their bases, and occupies the whole 

 middle portion of the anal cell, and the proximal half of the auxiliary and spurious 

 cells, including the alula. Abdomen dark brown, nearly black, more or less reddish 

 along the sides ; its rather convex upper surface densely clothed with an appressed 

 golden pubescence, which, in an oblique light, is especially apparent along the hind 

 margins of segments 2-4 ; narrow at the base, expanded on the second segment, and 

 from that point to the tip gradually attenuated. Venter dark brown or black, with 

 a similar golden pubescence. 



Three specimens. 



The eyes (revived on wet sand) show a design of zigzag lines on green ground. 



I have seen examples in the Berlin Museum (Mexico, Ehrenberg). Specimens in 

 the museum in Vienna bear the collection-name H. mexicana, Schin., and are alluded 

 to by Dr. Brauer (Sitzungber. d. k. Acad. d. Wiss. Wien, 1885, p. 152) as showing a 

 remarkable mimetic resemblance to certain species of Polistes. 



3. Hermetia crabro, sp. n. (Tab. I. fig. 4.) 



Eyes densely pubescent ; wings brown along the costa, as far as the fourth vein ; suture between the first and 

 second segments with a narrow transverse pellucid spot ; body black, some lines formed by golden-yellow 

 pile on the thorax ; abdomen comparatively short, broad and convex. 



Length 11-12 millim. 



Hab. Guatemala, El Eeposo 800 feet {Champion). 



Head black, with some traces of brownish-yellow in the middle of the face ; a yellow 

 spot on each side, near the eye, a little above the level of the root of the antennae ; 

 another spot higher up, almost on a level with the ocelli ; facial orbits somewhat pale, and 

 beset with a yellowish-white pubescence ; some pile of the same colour on the front ; 

 that on the vertex black ; frontal bump with four deep grooves ; eyes densely pubescent, 

 green, with numerous purple transverse streaks connected at their ends. Antennae 



