158 BULLETIN 66, UNITED STATES NATIONAL MUSEUM. 



?2. phseodes Perkins, 1905, parasitic on Hecalus immaculatus 

 Kirkaldy; Queensland. 



?3. stenodes Perkins, 1905, parasitic on Paradorydium menalus 

 Kirkaldy ; Queensland. 



?4. schwarzi Pierce, 1909, parasitic on DiedrocepJiala sanguinolenta 

 Coquibar, Guatemala. 



The following description is taken from Perkins : 



Male. — Head very deeply concave behind, seen from above consisting only of a 

 narrow rim supporting the eyes, and produced considerably in front of these to form 

 the tip of the blunt and wide frontal projection, at the sides of which the antenna? 

 are inserted. That which appears to be the tip of the head on superficial inspection 

 is in reality the dorsum of the pro- and meso-thorax, which in their natural position 

 are deeply immersed within the posterior concavity of the head, which they more or 

 less fill up. Antennas with the two basal joints simple, the following excessively 

 short, being produced laterally into an elongate and thin lamina, the first and fifth 

 (or last) of these laminse being larger than the others and capable of inclosing them in 

 a fan-like fashion. Mandibles very short compared with those of other Stylopids, 

 their tips not reaching one another, simply pointed. Labial palpi very large, the 

 second joint foliaceous half as wide as long, pilose, subacuminate at the apex. Scutel- 

 lar portion of the metanotum moderately large, penetrating somewhat between the 

 lateral lobes of its anterior portion, triangular, and very different from the small 

 semilunar scutellum of Elenchus; the postscutellum very elongate, twice as long as 

 wide, or appearing still longer in dry specimens, covering several of the basal abdominal 

 segments. Elytra clavate or ladle-shaped in well-preserved specimens. Wings 

 smoky hyaline, neuration black, very distinct. Tibiae dilated apically, and grooved 

 or hollowed above for the partial reception of the three- jointed tarsi, when these are 

 drawn up. (Perkins, 1905.) 



i. PENTOXOCERA AUSTRALENSIS Perkins (1905). 



Halictophagus (Bruesia) australensis Perkins, 1905, 1906. 

 Pentoxocera australensis Pierce, 1908. 



Host. — Tetigonia parthaon Kirkaldy, Cairns; Queensland (pi. 13, 

 figs. 8, 9, 10, 11, 12). 



Length about J mm. Expanse about 4 mm. 

 Perkins has described this species as follows: 



Male. — Black or blackish fuscous, the thorax paler, piceous or brownish, the lamel- 

 late joints of the antennas also paler, yellowish or sordid testaceous. Wings smoky 

 hyaline, with slight but evident iridescence, the neuration strong, black. Apical 

 abdominal segment with its genital process concave above and much produced, 

 towards the base with an upright tongue-shaped, pilose organ; in lateral view the sides 

 are slightly convergent to the apex, which is armed with a recurved hook, the tip of 

 which is itself bent upward; in front of the origin of this uncus the process has a 

 small deep emargination. The apical ventral segment is triangular and produced at 

 the apex. The abdomen is clothed with delicate cinereous pubescence. 



Female.- — Length about J mm. Head yellow or brownish yellow, distinctly rounded 

 at the sides, with a distinct anterior median area (or plate) marked out, and slightly 

 produced; tuberculate on either side of this area in front. The opening of the brood 

 chamber isbehind the middle of the exposed part of the head, the surface between this 

 opening and the apex subconvex. (Perkins, 1905.) 



