86 Psyche [April 



myia shows that in each case there are rudimentary lobes homol- 

 ogous with our "terminal lobes" at or near the base of the acicula. 

 It is only a step from the conditions described in the Lasioptera 

 named above, with its well developed terminal lobes and the 

 apical acicula arising just below, to follow the reduction and 

 migration of these organs cephalad as in Monarthropalpus 

 and Sackenomyia, and to proceed from this to what 

 we find in Asphondylia with its highly developed terminal 

 lobes apparently at the base of the ovipositor. The rela- 

 tionship obtaining in the last named form is due simply 

 to the mechanical necessity of having at the apex of the 

 abdomen a sufficient length of invaginating tissue to per- 

 mit the withdrawal of the extremely long acicula into the 

 body of the female. Obviously, under these conditions there 

 must be either reduction to practical extinction or migration, 

 and in the case of Asphondylia the latter prevailed and was 

 accompanied by an increase in size of the terminal lobes and their 

 modification to form the peculiar dorsal pouch. 



TWO NEW SPECIES OF HOLCASPIS FROM MEXICO. 



By William Beutenmuller. 



American Museum of Natural History, New York City. 



Holcaspis weldi, sp. nov. (Plate 12, fig. 2). 



Female. Head dusky yellowish brown, finely and evenly rugose, slightly 

 pubescent. Antennae dull brown, I-1-jointed, rather stout, third joint long and 

 slender, second subcylindrical, fourth joint shorter than the third and thick at 

 the end, following joints shorter and sub-equal. Thorax dull yellowish brown, 

 finely but distinctly punctate and slightly hairy. Parapsidal grooves distinct, and 

 almost reaching the collar. Median groove continuous and broadest at the scutel- 

 lum. Anterior parallel lines scarcely evident. Lateral grooves fine and not 

 distinct. Pleurae finely rugose. Scutellum dull yellowish brown, evenly rugose, 

 with a linear depression along the middle and a groove-like depression across the 

 base. Abdomen dark brown, paler dorsally, finely punctate and hairy along the 

 sides. Legs dull yellowish brown, middle and hind femora darker, femora rather 

 stout. Last tarsal joint and claws large and stout. Wings dusky hyaline, some- 

 what clouded, veins stout and brown. Radial area open. Areolet large. Cubitus 

 almost reaching the first cross-veins. Len'gth 3-4 mm. 



Gall. In clusters on the terminal twigs and leaves of Quercus reticulaia. 



Monothalamous. Globular, thin-shelled, yellowish and tinged various shades of 

 pink and red, covered with a dense rusty brown, pubescence, which may be rubbed 

 off with the fingers. Inside there is a rounded kernel held in position by radiating 



