CHEYSOPS.— DICLISA. 47 



Female. Face and front brownish-yellow pollinose ; callosities of the face but little 

 perceptible, as they differ only slightly from the face in colour, but towards the eyes they 

 are darker brown ; palpi small, reddish ; frontal callosity blackish or brown, almost like 

 an ace of spades in shape, somewhat rugose on the surface. Antennae nearly as long 

 as head and thorax together; the relative length of the joints is about 4J : 3 : 2 ; first 

 joint gently incrassate beyond the base, subcylindrical on its distal half; the second joint 

 gradually stouter from the base to the tip ; the third joint has an obconic basal segment, 

 and is annulate and gradually attenuate beyond. Thorax brown ; sides of the mesonotum 

 and of the scutellum yellowish-white; on the mesonotum are two, rather distant, yellowish- 

 white stripes, which in some specimens reach the scutellum (although much fainter), 

 usually they stop long before it ; pleura? with a brownish-white pollen. Abdomen brown ; 

 hind margins of the segments, beginning with the second, whitish, expanding into a small 

 triangle in the middle ; venter greyish pollinose, more or less brown at the base of the 

 segments. Legs rufous ; tarsi brown, except at the base ; tip of front tibiae brownish. 

 Wings with a broad brown cloud across the central cross-veins ; other clouds on the 

 bifurcation of the third vein and on the cross-veins at the end of the discal cell ; the 

 rest of the wing has a dingy pale brownish tinge, slightly more saturate between the 

 stigma and the apex. Five females. 



N.B. — The eyes of this species (revived on wet sand) are dark purple, unicolorous, and 

 do not show the usual markings of Chrysops. 



The Chrysops megaceras, Bell., is most closely allied to C. tanycerus, but is larger ; 

 the proportion of the antennal joints is different; the white hind margins of the 

 segments are almost imperceptible. I have seen the types in Turin. 



DICLISA. 



Diclisa, Schiner, Verh. zool.-bot. Ges. Wien, 1867, p. 311. 



1. Diclisa maculipennis. 



Diclisa maculipennis, Schiner, Reise d. Novara, p. 102, t. 2. f. 7 1 . 



Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet {Champion). — Venezuela 1 . 



The beard is white, rather than yellowish. I have a single female. 



2. Diclisa misera, sp. n., $ . 



Brownish-ochraceous, almost unicolorous ; wings of a uniform pale brownish tinge ; proboscis nearly as long as 



the body ; submarginal cell not appendiculate. 

 Length 10-11 millim. ; proboscis 8-9 millim. 



Hab. Guatemala, Lanquin and Panima (Champion). 



Head brownish-ochraceous, the conically projecting face a little more yellowish on 

 the sides ; on the underside a long yellowish-white beard ; antennae reddish, the tips 



